[CentOS] Thunderbird can not import S/MIME certificate

[Timo Schoeler]

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Hi,

in May 2015 I reported [0] that I can not import my S/MIME
certificate. Issuer is GlobalSign.

Jan Horak reassigned it to the nss guys ("This seems to be problem in
NSS code, reassigning to nss component"), but then the ticket idled
and was eventually closed by EOL of Fedora 21 (though I stated it
persists with F22).

I just reopened the ticket because it still doesn't work. The
certificate itself is okay, it works on other platforms.

Nobody else using S/MIME?

Best,

Timo

https://bugzilla.redhat.com/show_bug.cgi?id=1218977

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Re: [CentOS] C7 postfix problem

[Timo Schoeler]

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On 01/28/2016 03:24 PM, Rainer Traut wrote:

> Hi all,

Hi,

> topology: java/tomcat app mailing to the outside via a C7 postfix 
> relay server.
> 
> problem: java app submits mail to postfix but there is _nothing_ 
> logged in the postfix maillog. This happen for 2/3 of all mail 
> submitted. We cannot see any trace of this submitted mail either 
> incoming/stored/outgoing.
> 
> Log from java app (shortened): DEBUG: getProvider() returning 
> javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun
>
>
> 
Microsystems, Inc]
> DEBUG SMTP: useEhlo true, useAuth true DEBUG SMTP: trying to 
> connect to host "", port 25, isSSL false DEBUG SMTP: 
> Attempt to authenticate AUTH LOGIN 235 2.7.0 Authentication 
> successful DEBUG SMTP: use8bit false DEBUG SMTP: Verified Addresses
> DATA 354 End data with . message text*** 250
> 2.0.0 Ok: queued as 8D83AC2756DF QUIT 221 2.0.0 Bye
> 
> Log from the postfix server: [root@xxx postfix]# grep 8D83AC2756DF 
> /var/log/maillog [root@xxx postfix]#
> 
> This happens for 2/3 of all messages send to this server.
> 
> Any idea what is happening here?

first, I'd recommend to increase debug level of postfix (if it doesn't
totally flood your logs):

/etc/postfix/master.cf:

# Postfix master process configuration file.  For details on the format
# of the file, see the master(5) manual page (command: "man 5 master").
#
# Do not forget to execute "postfix reload" after editing this file.
#
#

==
# service type  private unpriv  chroot  wakeup  maxproc command + args
#   (yes)   (yes)   (yes)   (never) (100)
#

==
smtp  inet  n   -   n   -   -   smtpd -v <= !!!
#smtp  inet  n   -   n   -   1   postscreen
#smtpd pass  -   -   n   -   -   smtpd

smtpd -v instead of smtpd -- that will hopefully give some more insight.

> Thx Rainer

Best,

T.

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Re: [CentOS] Don't understand how to re-partition this setup or why it was made like this

[Timo Schoeler]

On 04/01/2013 09:00 PM, Yves S. Garret wrote:
> Hello,
> 
> I did df -h on my CentOS 6.4 machine.
> 
> $ df -h FilesystemSize  Used Avail Use% Mounted on 
> /dev/mapper/vg_ysg-lv_root 47G  8.8G   36G  20% / tmpfs
> 948M  372K  947M   1% /dev/shm /dev/sda1 485M   62M  398M
> 14% /boot /dev/mapper/vg_ysg-lv_home 4.6G  2.7G  1.7G  63% /home
> 
> What I don't understand is why is /home so tiny and how can I
> re-partition this without having to nuke and rebuild my machine?

You'd have to resize the logical volumes your FS lives on (here:
vg_ysg-lv_root and vg_ysg-lv_home) and resize the FS as well.

Can be done booting off a rescue medium w/o any problems. Make sure you
do have a complete backup, though.

HTH,

Timo
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Re: [CentOS] raid 1 question

[Timo Schoeler]

On 03/07/2013 05:43 PM, thus Paras pradhan spake:

> I don't get a grub so I can't issue "c" .

Replying off-list: Use the rescue mode of your installation CD/DVD. Then
you can apply the commands described there.

HTH,

Timo

> Paras.

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Re: [CentOS] raid 1 question

[Timo Schoeler]

On 03/07/2013 05:30 PM, thus Paras pradhan spake:

> Hi,

Hi,

> I have a server with 2 disks. Installed centos 5.9 with raid1. I 
> created /dev/md0 to hold "/"  and /dev/md1 for swap and nothing
> else. Grub is installed on /dev/md0. After the successful
> installation, the server does not boot. I don't see the boot loader .
> I see a blank cursor blinking.
> 
> What have I done wrong?

have you paid attention on 'Section Two' here?

http://wiki.centos.org/HowTos/SoftwareRAIDonCentOS5

> Thanks Paras.

HTH,

Timo

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Re: [CentOS] Too Many Running Process

[Timo Schoeler]

On 02/07/2013 11:51 AM, thus Prabhpal S. Mavi spake:
> 
> Dear List Users Greetings,
> 
> i have come across the problem where CentOS 6.3 x64 has more than 700
> processes running. i am not sure where to start, what in normal or
> abnormal.

You have a dual six core machine with Hyperthreading enabled?

> [root@jet]# ps -A
>   PID TTY  TIME CMD
> 1 ?00:00:03 init
> 2 ?00:00:00 kthreadd
> 3 ?00:00:00 migration/0
> 4 ?00:00:00 ksoftirqd/0
> 5 ?00:00:00 migration/0
> 6 ?00:00:00 watchdog/0
> 7 ?00:00:00 migration/1
> 8 ?00:00:00 migration/1
> 9 ?00:00:00 ksoftirqd/1
>10 ?00:00:00 watchdog/1
>11 ?00:00:00 migration/2
>12 ?00:00:00 migration/2
>13 ?00:00:00 ksoftirqd/2
>14 ?00:00:00 watchdog/2
>15 ?00:00:00 migration/3
>16 ?00:00:00 migration/3
>17 ?00:00:00 ksoftirqd/3
>18 ?00:00:00 watchdog/3
>19 ?00:00:00 migration/4
>20 ?00:00:00 migration/4
>21 ?00:00:00 ksoftirqd/4
>22 ?00:00:00 watchdog/4
>23 ?00:00:00 migration/5
>24 ?00:00:00 migration/5
>25 ?00:00:00 ksoftirqd/5
>26 ?00:00:00 watchdog/5
>27 ?00:00:00 migration/6
>28 ?00:00:00 migration/6
>29 ?00:00:00 ksoftirqd/6
>30 ?00:00:00 watchdog/6
>31 ?00:00:00 migration/7
>32 ?00:00:00 migration/7
>33 ?00:00:00 ksoftirqd/7
>34 ?00:00:00 watchdog/7
>35 ?00:00:00 migration/8
>36 ?00:00:00 migration/8
>37 ?00:00:00 ksoftirqd/8
>38 ?00:00:00 watchdog/8
>39 ?00:00:00 migration/9
>40 ?00:00:00 migration/9
>41 ?00:00:00 ksoftirqd/9
>42 ?00:00:00 watchdog/9
>43 ?00:00:00 migration/10
>44 ?00:00:00 migration/10
>45 ?00:00:00 ksoftirqd/10
>46 ?00:00:00 watchdog/10
>47 ?00:00:00 migration/11
>48 ?00:00:00 migration/11
>49 ?00:00:00 ksoftirqd/11
>50 ?00:00:00 watchdog/11
>51 ?00:00:00 migration/12
>52 ?00:00:00 migration/12
>53 ?00:00:00 ksoftirqd/12
>54 ?00:00:00 watchdog/12
>55 ?00:00:00 migration/13
>56 ?00:00:00 migration/13
>57 ?00:00:00 ksoftirqd/13
>58 ?00:00:00 watchdog/13
>59 ?00:00:00 migration/14
>60 ?00:00:00 migration/14
>61 ?00:00:00 ksoftirqd/14
>62 ?00:00:00 watchdog/14
>63 ?00:00:00 migration/15
>64 ?00:00:00 migration/15
>65 ?00:00:00 ksoftirqd/15
>66 ?00:00:00 watchdog/15
>67 ?00:00:00 migration/16
>68 ?00:00:00 migration/16
>69 ?00:00:00 ksoftirqd/16
>70 ?00:00:00 watchdog/16
>71 ?00:00:00 migration/17
>72 ?00:00:00 migration/17
>73 ?00:00:00 ksoftirqd/17
>74 ?00:00:00 watchdog/17
>75 ?00:00:00 migration/18
>76 ?00:00:00 migration/18
>77 ?00:00:00 ksoftirqd/18
>78 ?00:00:00 watchdog/18
>79 ?00:00:00 migration/19
>80 ?00:00:00 migration/19
>81 ?00:00:00 ksoftirqd/19
>82 ?00:00:00 watchdog/19
>83 ?00:00:00 migration/20
>84 ?00:00:00 migration/20
>85 ?00:00:00 ksoftirqd/20
>86 ?00:00:00 watchdog/20
>87 ?00:00:00 migration/21
>88 ?00:00:00 migration/21
>89 ?00:00:00 ksoftirqd/21
>90 ?00:00:00 watchdog/21
>91 ?00:00:00 migration/22
>92 ?00:00:00 migration/22
>93 ?00:00:00 ksoftirqd/22
>94 ?00:00:00 watchdog/22
>95 ?00:00:00 migration/23
>96 ?00:00:00 migration/23
>97 ?00:00:00 ksoftirqd/23
>98 ?00:00:00 watchdog/23
>99 ?00:00:00 events/0
>   100 ?00:00:00 events/1
>   101 ?00:00:00 events/2
>   102 ?00:00:00 events/3
>   103 ?00:00:00 events/4
>   104 ?00:00:00 events/5
>   105 ?00:00:00 events/6
>   106 ?00:00:00 events/7
>   107 ?00:00:00 events/8
>   108 ?00:00:00 events/9
>   109 ?00:00:00 events/10
>   110 ?00:00:00 events/11
>   111 ?00:00:00 events/12
>   112 ?00:00:00 events/13
>   113 ?00:00:00 events/14
>   114 ?00:00:00 events/15
>   115 ?00:00:00 events/16
>   116 ?00:00:00 events/17
>   117 ?00:00:00 events/18
>   118 ?00:00:00 events/19
>   119 ?00:00:00 events/20
>   120 ?00:00:00 events/21
>   121 ?00:00:00 events/22
>   122 ?00:00:00 events/23
>   123 ?00:00:00 cgroup
>   124 ?  

Re: [CentOS] Centos 6.3: load average strangeness

[Timo Schoeler]

On 01/18/2013 11:28 AM, thus Dario Lesca spake:

> Il giorno gio, 17/01/2013 alle 13.09 +0100, Dennis Jacobfeuerborn ha
> scritto:

>> Looks like https://bugzilla.redhat.com/show_bug.cgi?id=883905
>>
>> Regards, Dennis
>
> Ok, Then solution, after read this from bug 883905:
>
>> Brian Foster 2013-01-08 10:28:08 EST The current consensus for this
>> bug is that the fix is fine, but the appropriate target is rhel6.5
>> and forward, as this is primarily a reporting issue.
>
> .. is backup my data and converting (formatting) the xfs FS to ext4.
>
> Or exist some other workaround?

Ignoring it, because it doesn't hurt?

> Thanks.
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Re: [CentOS] Temperature on Poweredge 2850

[Timo Schoeler]

On 10/18/2012 08:23 PM, thus Surya Saha spake:
> I am trying to get the temperature of a Poweredge 2850 with CentOS
> 6.3 on it. Has anybody on this list done this successfully? Thanks
> 
> -Surya

Install 'lm_sensors' and run 'sensors-detect' to check what it finds.

On an 2950:

[timo@vengeance ~]# sensors
i5k_amb-isa-
Adapter: ISA adapter
Ch. 0 DIMM 0: +48.0°C  (low  = +105.0°C, high = +124.0°C)
Ch. 0 DIMM 1: +42.0°C  (low  = +105.0°C, high = +124.0°C)
Ch. 1 DIMM 0: +41.0°C  (low  = +105.0°C, high = +124.0°C)
Ch. 1 DIMM 1: +38.5°C  (low  = +105.0°C, high = +124.0°C)
Ch. 2 DIMM 0: +46.5°C  (low  = +105.0°C, high = +124.0°C)
Ch. 2 DIMM 1: +43.0°C  (low  = +105.0°C, high = +124.0°C)
Ch. 3 DIMM 0: +46.0°C  (low  = +105.0°C, high = +124.0°C)
Ch. 3 DIMM 1: +43.5°C  (low  = +105.0°C, high = +124.0°C)

coretemp-isa-
Adapter: ISA adapter
Core 0:  +40.0°C  (high = +80.0°C, crit = +100.0°C)
Core 1:  +42.0°C  (high = +80.0°C, crit = +100.0°C)

coretemp-isa-0001
Adapter: ISA adapter
Core 0:  +50.0°C  (high = +80.0°C, crit = +100.0°C)
Core 1:  +57.0°C  (high = +80.0°C, crit = +100.0°C)

> PS: Apologies for cross posting if you are on the Poweredge list.

HTH,

Timo
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Re: [CentOS] Weird behaviour of ifcfg scripts

[Timo Schoeler]

On 10/02/2012 03:03 PM, thus Reindl Harald spake:
>
> Am 02.10.2012 15:00, schrieb Timo Schoeler:
>> Hi,
>>
>> I accidentally found that the existence of a file e.g. named
>> ifcfg-eth1:1 put in /etc/sysconfig/network-scripts/ leads to the
>> appropriate interface being created even with the option 'ONBOOT' set to
>> 'no':
>>
>> DEVICE="eth1:1"
>> BOOTPROTO="static"
>> NM_CONTROLLED="no"
>> ONBOOT="no"
>> TYPE="Ethernet"
>> IPADDR=12.34.56.78
>> NETMASK=255.255.255.0
>>
>> Is that intended behaviour?
>
> yes because what you want is ONPARENT since it
> is a pseudo device to assign more than one IP
> to a physical NIC

*facepalm

Thanks, yes.
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[CentOS] Weird behaviour of ifcfg scripts

[Timo Schoeler]

Hi,

I accidentally found that the existence of a file e.g. named 
ifcfg-eth1:1 put in /etc/sysconfig/network-scripts/ leads to the 
appropriate interface being created even with the option 'ONBOOT' set to 
'no':

DEVICE="eth1:1"
BOOTPROTO="static"
NM_CONTROLLED="no"
ONBOOT="no"
TYPE="Ethernet"
IPADDR=12.34.56.78
NETMASK=255.255.255.0

Is that intended behaviour?
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[CentOS] Another NTP issue (fake leap second)

[Timo Schoeler]

Hi list,

just out of curiosity: Was anybody affected by this?

http://lists.ntp.org/pipermail/questions/2012-August/033611.html

Cheers,

Timo
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Re: [CentOS] Limiting network traffic from different IPs.

[Timo Schoeler]

On 05/04/2012 11:13 AM, thus Rafał Radecki spake:

> Hi all.

Hi Rafal,

> I have a router with 5 network interfaces and sometimes there is so
> much traffic on one of them that the server load is very high. What
> are the options to limit the traffic per IP address on every 
> interface? Which need least system (CPU, memory) resources?

maybe using tc would be of help for you; there are a bunch of nice how
to's on the net, e.g.:

http://wiki.openvz.org/Traffic_shaping_with_tc

http://tldp.org/HOWTO/Traffic-Control-HOWTO/index.html

> Thanks.
> 
> Best regards, Rafal.

HTH,

Timo
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Re: [CentOS] Timeframe for httpd update (CVE-2011-3192)

[Timo Schoeler]

thus Always Learning spake:
> On Thu, 2011-09-01 at 12:29 +0200, Timo Schoeler wrote:
>> That's exactly what I mean about the 'transparency' aspect. This was a
>> very very big issue with impact on many many machines. Administrators
>> sitting there waiting for that update, maybe sleepless because
>> workarounds didn't do what they were supposed to do.
>>
>> Regarding that update already being mirrored: No communication here.
>> That's hilarious.
> 
> Please remember excellent CENTOS is a FREE product produced by
> VOLUNTEERS.

First possibility: I don't get your sarcasm.

Second possibility: You don't remember the discussion about what the
"community" in CentOS is around the first months of 2011.
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Re: [CentOS] Timeframe for httpd update (CVE-2011-3192)

[Timo Schoeler]

thus Karanbir Singh spake:
> On 09/01/2011 11:15 AM, Timo Schoeler wrote:
>> is there any time frame foreseeable for KB providing an update for httpd?
> 
> the rpm is already pushed, should be on the mirrors now'ish.

That's exactly what I mean about the 'transparency' aspect. This was a
very very big issue with impact on many many machines. Administrators
sitting there waiting for that update, maybe sleepless because
workarounds didn't do what they were supposed to do.

Regarding that update already being mirrored: No communication here.
That's hilarious.

>> (Given that 5.7 is still to be done, 6.1, etc., and due to the fact
>> there is "no such thing as a CentOS community", as was discussed end of
>> 2010/early 2011. That's why I'm *not* going to provide my diff -- I'm
>> not willing to spend my work into an entity that denies transparency.)
> 
> no one asked you to do anything.

Where did I imply that?

> Also, because you cant get your head 
> around things does not imply that no one else does.

Crystal ball, etc.

> - KB
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[CentOS] Timeframe for httpd update (CVE-2011-3192)

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
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Hi,

is there any time frame foreseeable for KB providing an update for httpd?

Upstream provided their SRPM yesterday, i.e. Aug 31 19:40. [0] [1]

It builds flawless on several machines I tried (Scientific Linux 6,
CentOS 5 and 6).

Question is: Should one deploy a self-build RPM or will there be an
update in the next... "time"?

(Given that 5.7 is still to be done, 6.1, etc., and due to the fact
there is "no such thing as a CentOS community", as was discussed end of
2010/early 2011. That's why I'm *not* going to provide my diff -- I'm
not willing to spend my work into an entity that denies transparency.)

Cheers.

[0] --
ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/httpd-2.2.3-53.el5_7.1.src.rpm

[1] -- https://rhn.redhat.com/errata/RHSA-2011-1245.html
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Re: [CentOS] Apache warns Web server admins of DoS attack tool

[Timo Schoeler]

thus Karanbir Singh spake:
> On 08/30/2011 11:33 PM, Thomas Harold wrote:
>> Someday, perhaps we'll end up back on an authenticated version of NNTP,
>> with support for bbcode, images, and the front end reader of your choice...
> 
> Thats quite a good idea - and something that we explored at length when 
> looking for a replacement software for the existing forums. And while 
> that would be nice to have, reduce content duplication and assert some 
> level of authority across venues etc, its still not really the 
> master-solution. The bridge would be good to have, but there are lots of 
> people who chose a venue to work with based on their own expectations, 
> comfort level and media they prefer working with. In some cases, like 
> the people here on the list - mailing lists are the way to go. Others 
> prefer to use the forums. While plenty hang out on IRC. Lets not take 
> the choice away from people.
> 
> - KB

Just released:

https://www.apache.org/dist/httpd/Announcement2.2.html
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Re: [CentOS] CentOS 5.5 does not recognise SAS drives with LSI 1068E Controller

[Timo Schoeler]

thus Peter Peltonen spake:
> I have now partially solved my problem:
> 
> On Wed, Mar 9, 2011 at 5:55 PM, Peter Peltonen  
> wrote:
>> I need to do a new CentOS net install on a new server having the
>> Supermicro X7DVL-3 motherboard:
> 
> [...]
> 
>> So I assume the controller is not supported and I need a binary driver
>> for it. For 1068e it should be:
> 
> I received the driver image megasr-13.17.0421.2010-1-rhel50-u5-all.img
> from the hardware vendor and was able to use it as the driver disk for
> installation.
> 
> Upgrading the kernel issue is still unresolved though:
> 
>> And what happens if I get the driver installed and then the server's
>> kernel is updated? Do I need reinstall the driver somehow?
> 
> After updates the system is unable to boot with the new kernel as it
> cannot find the megasr driver.
> 
> What shoudl I do? Does the megasr module for the old kernel also work
> with the new kernel => do I need to copy it somewhere and create an
> initrd  image including that module? Or do I need to find an updated
> megasr module from somewhere?

I had this hardware, too, from a customer of ours.

http://blog.uguu.ru/tag/piece-of-shit/

It's not my blog but it's exactly what reality ist like.

Cheers,

Timo

> Best regards,
> Peter


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[CentOS] Access to a Power6/Power7 machine?

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Hi,

is there anybody here who has access to such a machine and could test
e... 'some software' there?

Please mail me privately.

Thanks & best,

Timo
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Re: [CentOS] Troubles for an non-IT beginner

[Timo Schoeler]

thus John R Pierce spake:
> On 01/18/11 10:51 PM, Geoff Galitz wrote:
>>> Wrong on the demise of the Sparc. Oracle just posted a massively
>>> record breaking TPC-C benchmark using their new Sparc T3 servers,
>>> something like 30 MILLION TPM.
>> Oracle has very publically committed to keeping SPARC strong, which is good
>> news for those of us believe in diversity in the compute-verse.  Even so,
>> SPARC is also supported by Fujitsu, so as they... "[SPARC's] demise has been
>> greatly exaggerated."
>>
>>
>>> There's also Power aka PPC, formerly used in Apple Macintosh computers,
>>> and still used on large scale IBM AIX Unix servers, the Power series.
>>> These also are very high performance.
>> Just a minor nit here, POWER is not the same thing as PPC.  PPC branched
>> from POWER with strong influences from other vendors and technologies.  PPC
>> has since evolved into a mostly embedded platform, though later POWER
>> releases are (mostly) compatible with PPC.
> 
> the Power6 and Power7 have the altvec and most of the rest of the PPC 
> extensions.   when you compile for the power, if you are using gcc, you 
> generally specify ppc as the architecture.  With IBM's XLC, of course, 
> you specify Power 4 or 5 or 6 or 7.  Power 5 and later have extensive 
> virtualization support native in the hardware, enabling LPAR 
> partitioning of servers.
> 
> of course, this has nothing to do with centos, as far as I know, RH gave 
> up supporting Power,

No, they didn't. RHEL6 is available for IBM Power:

http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Release_Notes/introduction.html

> and Sooshay was the official IBM distribution.   
> with Novell imploding, I'm not sure what happened with Suse.


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Re: [CentOS] OT: best ext3/2 file recovery tool?

[Timo Schoeler]

On 12/15/2010 10:05 PM, Eero Volotinen wrote:
> Hi,
>
> What is the best tool for recovering files on really corrupted ext
> filesystem? I already tried photorec, but are there any better
> solutions available? (commercial software ?)

Hi,

maybe CAINE

http://www.caine-live.net/

is worth a look...?

> --
> Eero

Timo
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Re: [CentOS] Antwort: MegaRAID SAS 9280-24i4e -- Centos support.

[Timo Schoeler]

thus Lisandro Grullon spake:
> Thank u timo,
> I will test this further when I get home. I have been having nightmares 
> getting this card working from an OS iso, it appears that the card is very 
> new and the drivers have not been integrated into the distributions or 
> kernel. The alternative is to load the driver via console using any of the 
> modules supply by LSI. Thank you again Timo for your guidance. Lisandro

You're welcome.

Ah, and welcome to the world of proprietary drivers. This is something
that the OpenBSD guys do right: They ignore them. ;)

Timo

> Sent on the Sprint® Now Network from my BlackBerry®
> 
> -----Original Message-
> From: Timo Schoeler 
> Sender: centos-boun...@centos.org
> Date: Tue, 14 Dec 2010 15:33:22 
> To: CentOS mailing list
> Reply-To: CentOS mailing list 
> Subject: Re: [CentOS] Antwort:  MegaRAID SAS 9280-24i4e -- Centos support.
> 
> thus Lisandro Grullon spake:
>> Thank u andrea for the response, but unfortunately  a floppy its not
>> an option in my box. Can u guide me using a usb flash drive. Much
>> appreciated. Lisandro
> 
> Should work similar to writing to a FDD.
> 
> Maybe you have to experiment if plugging the stick into the machine
> *before* booting or when anaconda requests the driver disk works -- I
> have seen machines behave differently in this regard.
> 
> Timo
> 
>> Sent on the Sprint® Now Network from my BlackBerry®
> 
>> -Original Message- From: Andreas Reschke
>>  Sender: centos-boun...@centos.org 
>> Date: Tue, 14 Dec 2010 15:06:13 To: CentOS mailing
>> list Reply-To: CentOS mailing list
>>  Subject: [CentOS] Antwort:  MegaRAID SAS
>> 9280-24i4e -- Centos support.
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Re: [CentOS] Antwort: MegaRAID SAS 9280-24i4e -- Centos support.

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus Lisandro Grullon spake:
> Thank u andrea for the response, but unfortunately  a floppy its not
> an option in my box. Can u guide me using a usb flash drive. Much
> appreciated. Lisandro

Should work similar to writing to a FDD.

Maybe you have to experiment if plugging the stick into the machine
*before* booting or when anaconda requests the driver disk works -- I
have seen machines behave differently in this regard.

Timo

> Sent on the Sprint® Now Network from my BlackBerry®
> 
> -Original Message- From: Andreas Reschke
>  Sender: centos-boun...@centos.org 
> Date: Tue, 14 Dec 2010 15:06:13 To: CentOS mailing
> list Reply-To: CentOS mailing list
>  Subject: [CentOS] Antwort:  MegaRAID SAS
> 9280-24i4e -- Centos support.

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Re: [CentOS] Antwort: MegaRAID SAS 9280-24i4e -- Centos support.

[Timo Schoeler]

thus Andreas Reschke spake:
> Hi Lisandro,
> 
> just look at 
> http://www.lsi.de.com/channel/products/raid_controllers/sata_sas/9280-24i4e/index.html
>  
> and read the readme.txt. 
> 
> 1. download the megaraid_sas-v00.00.04.31-CentOs5.5-all.img
> 2. insert a floppy
> 3. dd if= megaraid_sas-v00.00.04.31-CentOs5.5-all.img of=/dev/floppy
> and type at the boot-prompt "linux dd" 

(It should work using an USB stick, too...

Timo)

> That's all
> 
> Andreas
> 
> 
> 
> 
> "Lisandro Grullon"  
> Gesendet von: centos-boun...@centos.org
> 14.12.2010 14:26
> Bitte antworten an
> CentOS mailing list 
> 
> 
> An
> 
> Kopie
> 
> Thema
> [CentOS] MegaRAID SAS 9280-24i4e -- Centos support.
> 
> 
> 
> 
> 
> Dear centos community,
> I was in the process of installing centos in a machine however during the 
> install the OS is unable to see the controller "MegaRAID SAS 9280-24i4e", 
> i noticed that LSI has some drivers for centos. Can someone guide me on 
> how to load the drivers so the OS can see the controller as it loads. 
> Thank you in advance. Lisandro

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Re: [CentOS] CentOS cluster solution

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus David S. spake:
> Hi Timo,
> I mean parallel cloud computing, do you have solution for this case?

First thing that comes to my mind is

http://hadoop.apache.org/

which we use ourself for cloud computing. There's a nice tutorial here:

http://www.ibm.com/developerworks/aix/library/au-cloud_apache/

(don't let 'AIX' shock you, it's about Linux).

HTH,

Timo

> -
> --
> Best regards,
> David
> http://blog.pnyet.web.id
> 
> 
> On 12/14/2010 05:24 PM, Timo Schoeler wrote:
>> thus David S. spake:
>>> Dear All,
>>> I got a new project to build cloud computing base on centos clustering
>>> (clustering and cluster storage). whether failover, load balancing can
>>> be applied?
>>> I've read about CentOS clustering and cluster storage but I'm still
>>> confused, any help or advice in this thread will be appreciate.
>> Hi David,
>>
>> what exactly are you trying to achieve? Is it just 'plain loadbalancing'
>> of services (such as HTTP requests, IMAP or similar) or massively
>> parallel cloud computing stuff?
>>
>>> Cheers...
>> Timo

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Re: [CentOS] CentOS cluster solution

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus David S. spake:
> Dear All,
> I got a new project to build cloud computing base on centos clustering
> (clustering and cluster storage). whether failover, load balancing can
> be applied?
> 
> I've read about CentOS clustering and cluster storage but I'm still
> confused, any help or advice in this thread will be appreciate.

Hi David,

what exactly are you trying to achieve? Is it just 'plain loadbalancing'
of services (such as HTTP requests, IMAP or similar) or massively
parallel cloud computing stuff?

> Cheers...

Timo
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=MDB3
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Re: [CentOS] system startup sound

[Timo Schoeler]

On 12/10/2010 05:42 PM, m.r...@5-cent.us wrote:
> Ritika Garg wrote:
>> Whenever the system boots there is sound ( beep ). Is there any way to
>> disable it?
>
> That's a firmware/BIOS thing, if it's the one I think.
>
> mark

Pull the cable of the internal PC speaker. The annoying 'beep' is the 
only sensible sound that thing is capable of, anyways. (Yes, I know 
there are ways to redirect sound to that crappy device an yes, I had 
hard laughs of it way back in Amiga times, too. :)
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Re: [CentOS] 1 Gbit/s Ethernet NIC under CentOS

[Timo Schoeler]

On 12/02/2010 04:34 PM, m.r...@5-cent.us wrote:
> Bent Terp wrote:
>> On Wed, Dec 1, 2010 at 8:36 PM, Timo Schoeler
>>   wrote:
>>> You get what you pay for -- this is a valid rule of thumb throughout the
>>> whole life.
>>
>> Except with CentOS - we get SO much more than we pay for :-D
>
> Hah - I was thinking of another angle: so, Timo, you pay for love?

No, I get paid. Billions of dollars. ;P

>mark "that's not quite what I think of when I use that word"
>
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Re: [CentOS] 1 Gbit/s Ethernet NIC under CentOS

[Timo Schoeler]

On 12/01/2010 08:33 PM, Boris Epstein wrote:
> On Wed, Dec 1, 2010 at 2:29 PM, Gilbert Sebenste
>   wrote:
>> On Wed, 1 Dec 2010, Steve Thompson wrote:
>>
>>> On Wed, 1 Dec 2010, Timo Schoeler wrote:
>>>
>>>> Intel. Broadcom. That's what we use here w/o any issues; however, there
>>>> are some Intel NICs that are *not* able to handle Jumbo Frames due to an
>>>> internal design glitch.
>>>
>>> Seconded. I have a load of Intel 82576 and 82571EB's, and there have been
>>> no issues at all, including with Jumbo frames.
>>
>> Thirded. :-) Same thing here, even with generic Intel 1 GB Ethernet cards.
>>
>> ***
>> Gilbert Sebenste 
>> (My opinions only!)  **
>> ***
>> ___
>> CentOS mailing list
>> CentOS@centos.org
>> http://lists.centos.org/mailman/listinfo/centos
>>
>
> Thanks. Looks good.
>
> I just looked around - looks like manufacturers tend not to list the
> chipset in their NIC specifications (like here, for instance:
> http://www.trendnet.com/products/proddetail.asp?prod=140_TEG-PCITXR&cat=14
> )
>
> Is there a list somewhere out there listing what card features what chipset?
>
> It definitely looks like it is best to just stick to the better
> chipsets - might be a little more expensive but definitely worth the
> money.

You get what you pay for -- this is a valid rule of thumb throughout the 
whole life.

> Thanks.
>
> Boris.

Timo
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Re: [CentOS] 1 Gbit/s Ethernet NIC under CentOS

[Timo Schoeler]

On 12/01/2010 08:12 PM, Boris Epstein wrote:
> Hello listmates,
>
> As some of you may know we have been having a really bad problem with
> Realtek Semiconductor Co., Ltd. RTL-8169 cards. See here for details:
>
> http://forum.nginx.org/read.php?24,140124,140224
>
> So now my question is, what PCI 1 Gbit/s Ethernet adapters should I
> use under CentOS? If you have had a consistent positive experience
> with any particular chipset/brand please speak up.

Well, Realcrap is known to be crap everywhere. Ask the OpenBSD guys. ;)

Intel. Broadcom. That's what we use here w/o any issues; however, there 
are some Intel NICs that are *not* able to handle Jumbo Frames due to an 
internal design glitch.

HTH,

Timo

> Thanks.
>
> Boris.


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Re: [CentOS] centos 5.5 - using mp3

[Timo Schoeler]

On 12/01/2010 07:19 PM, cybernet wrote:
> centOS 5.5 is for servers not for desktops, please get use to that
> use another distribution like ... a very popular one for desktops

Sorry, but this is nonsense. I myself run CentOS on my workstation at 
the office (heaviest duty network admin, I wouldn't want any other Linux 
distro running there) as well as at home. Ah, yes, and I even watch 
videos there. And use Flash(tm)! ;)

Cheers...

> 
> *From:* Johan Scheepers 
> *To:* centos 
> *Sent:* Wed, December 1, 2010 5:04:58 PM
> *Subject:* [CentOS] centos 5.5 - using mp3
>
> Good day,
>
> Been googling about this matter.
> Afraid I am now confused.
> Too many options..: for/against/whatever.
> Some is years ago.
>
> Kindly please a step x step manner in which to accomplish to enable mp3
> please.
> Thanks
> Johan
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[CentOS] "Cracking Passwords In The Cloud: Amazon ’s New EC2 GPU Instances" -- using CentOS

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Hi,

in case someone missed it: CentOS was used in a EC2 setup to demonstrate
GPU-based brute force cracking of passwords.

"Cracking Passwords In The Cloud: Amazon’s New EC2 GPU Instances"

http://stacksmashing.net/2010/11/15/cracking-in-the-cloud-amazons-new-ec2-gpu-instances/

See also:

http://it.slashdot.org/story/10/11/16/1549245/Cracking-Passwords-With-Amazon-EC2-GPU-Instances

Cheers,

Timo :)
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Re: [CentOS] Fail Transfer of Large Files

[Timo Schoeler]

On 11/20/2010 06:35 PM, Les Mikesell wrote:
> On 11/19/10 3:16 PM, Michael D. Berger wrote:
>> On my intranet, I sometimes transfer large files, about 4G,
>> to an CentOS old box that I use for a web server.  I transfer
>> with ftp or sftp.  Usually, before the file is complete, the
>> transfer "stalls".  At that point, ping from the destination box
>> to the router fails.  I then deactivate the net interface on the
>> destination box and then activate it.  Ping is then successful,
>> and the transfer is completed.  The transferred file is correct,
>> as verified with sha1sum.
>>
>> All connections are via cat6 wire.
>>
>> So what do you think?  Should I try changing the net card?
>> Any tests to run? Any other suggestions?
>
> I haven't seen anything like that, at least in many years so it probably is
> hardware related - but make sure your software is up to date.  As a 
> workaround,
> you might try using rsync with the --bwlimit option to limit the speed of the
> transfer - and the -P option so you can restart a failed transfer from the 
> point
> it stalled on the last attempt.

If you have a managed switch, check its counters for errors (CRC, 
giants, runts, etc) and check whether speed and duplex settings are 
appropriate for all machines connected.

You should also check whether all devices involved are able to handle 
the MTU you use. I had a similar issue recently with Cisco gear that 
wouldn't play with the MTUs I had set on some of my machines.

Cheers,

Timo
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Re: [CentOS] How can I setup to allow php running on CentOS server?

[Timo Schoeler]

thus wang suya spake:
> Hi Timo
> 
>Thank you but I tryed "yum install php-5.1.6-27.el5"
> it said that "Package php-5.1.6-27.el5.i386 already installed and latest 
> version Nothing to do"
> Do you know why?

Yes -- sorry, I need coffee, I didn't see it already was installed on
your machine.

Try to run

restorecon -Rv -n /var/www/html

and try again -- maybe SELinux is the showstopper here.

Timo

> Thanks! 
> Wang
> 
> thus wang suya spake:
 Hi Timo
Thank you very much for answer my question
 it comes:
 php-mbstring-5.1.6-27.el5
 php-common-5.1.6-27.el5
 php-5.1.6-27.el5
 php-ldap-5.1.6-27.el5
 php-cli-5.1.6-27.el5
> You need to install
> 
> php-5.1.6-27.el5
> 
> because it contains the module Apache (httpd) needs to work.
> 
> HTH,
> 
> Timo
> 
 do you know what information for these?
 Thanks

 Wang


 thus wang suya spake:
>>>Dear Everyone
>>>
>>>   I met truble to setup centos Server. I installed centos lastest 
>>> version, then
>>> installed apache lastest version and yum installed php lastest version. 
>>> And looked
>>> at internet information to set up httpd.conf, then I run 
>>> http://localhost/test.php
>>> but forbbiton 403 error return to me. Who know how to set up to allow 
>>> php run in
>>> my server? Thank you in advance
>>>
>>>   Wang
 Hi,

 what output gives "rpm -qa|grep php"?

 Do you have SELinux enabled (check "sestatus")?

 Timo

>>> wang suya
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Re: [CentOS] How can I setup to allow php running on CentOS server?

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus wang suya spake:
> Hi Timo
>Thank you very much for answer my question
> it comes:
> php-mbstring-5.1.6-27.el5
> php-common-5.1.6-27.el5
> php-5.1.6-27.el5
> php-ldap-5.1.6-27.el5
> php-cli-5.1.6-27.el5

You need to install

php-5.1.6-27.el5

because it contains the module Apache (httpd) needs to work.

HTH,

Timo

> do you know what information for these?
> Thanks
> 
> Wang
> 
> 
> thus wang suya spake:
Dear Everyone

   I met truble to setup centos Server. I installed centos lastest 
 version, then
 installed apache lastest version and yum installed php lastest version. 
 And looked
 at internet information to set up httpd.conf, then I run 
 http://localhost/test.php
 but forbbiton 403 error return to me. Who know how to set up to allow php 
 run in
 my server? Thank you in advance

   Wang
> Hi,
> 
> what output gives "rpm -qa|grep php"?
> 
> Do you have SELinux enabled (check "sestatus")?
> 
> Timo
> 
 wang suya
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Re: [CentOS] How can I setup to allow php running on CentOS server?

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus wang suya spake:
> 
>Dear Everyone
> 
>   I met truble to setup centos Server. I installed centos lastest 
> version, then
> installed apache lastest version and yum installed php lastest version. And 
> looked
> at internet information to set up httpd.conf, then I run 
> http://localhost/test.php
> but forbbiton 403 error return to me. Who know how to set up to allow php run 
> in
> my server? Thank you in advance
> 
>   Wang

Hi,

what output gives "rpm -qa|grep php"?

Do you have SELinux enabled (check "sestatus")?

Timo

> wang suya
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Re: [CentOS] easy httpd's problem

[Timo Schoeler]

On 11/16/2010 09:25 AM, 49163653 wrote:
> your guys:
> I can't see the direcotry under / produced by *mkdir* command via
> Internat Explorer, except the any direcotry and file that exist after
> the CentOS installation complete.
> This is my directory 's detail information:
> drwxr-xr-x root www-data root:object_r:default_t CenterRepo
> and my httpd's configuration information:
> 
> ServerAdmin gitserver
> DocumentRoot /
> 
> Options Indexes FollowSymLinks includes
> order allow,deny
> AllowOverride None
> allow from all
> 
> ServerName dummy-host.example.com
> ErrorLog logs/dummy-host.example.com-error_log
> CustomLog logs/dummy-host.example.com-access_log common
> 
> I just make sure the the CenterRepo directory belong to the www-date
> group which run by httpd ,why can't I still access that directory?
> Thanks for your help!
> 2010-11-16
> 
> 49163653

Hi,

I assume your machines' SELinux is enabled:

http://wiki.centos.org/HowTos/SELinux#head-0f6390ddacfab39ee973ed8018a32212c2a02199

Cheers,

Timo
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[CentOS] FYI: Red Hat Enterprise Linux 6 Release Candidate Available to Partners

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
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There's progress...

http://press.redhat.com/2010/10/18/red-hat-enterprise-linux-6-release-candidate-available-to-partners/

Cheers,

Timo
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Re: [CentOS] installing centOS5.5

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus Ritika Garg spake:
> Want to install CentOS 5.5 by burning the image on DVD. On the link:
> http://mirrors.hns.net.in/centos/5.5/isos/x86_64/, there is a list given.
> CentOS-5.5-x86 64-bin-DVD.torrent is in the list. So is the download of the
> .iso possible only through torrent?

No, there are servers which do have the DVD downloadable; however, it's
not the case for all the servers.

http://www.centos.org/modules/tinycontent/index.php?id=30

(Check the 'Direct DVD Downloads' coloumn.)

> There is CentOS-5.5-x86 64-netinstall.iso Is this also an .iso which one can
> download to install CentOS5.5?

Yes, it will boot the installer, which then fetches the packeges needed
via your internet connection. However, a connection is mandatory then,
in contrast to an installation from DVD. But keep in mind to update the
system ASAP using 'yum update', for which an internet connection is of
course needed, too.

HTH,

Timo
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Re: [CentOS] the wandering MAC?

[Timo Schoeler]

On 10/13/2010 06:46 PM, Giles Coochey wrote:
>On 13/10/2010 18:37, Boris Epstein wrote:
>> On Wed, Oct 13, 2010 at 12:35 PM, Benjamin Franz   wrote:
>>> On 10/13/2010 09:28 AM, Boris Epstein wrote:
 What's happening is, it is showing up under one of the two MAC's:
 either 00:0a:cd:1a:c1:71 or 00:00:00:00:c1:71. If you reboot it the
 MAC stays the same; if you shutdown and do a full powerdown it seems
 to change.

>>> I would say the card is probably dying and replace it.
>>>
>> Thanks.
>>
>> That's possible, sure. I wonder though - it seems to work just fine
>> when it's up, pretty fast, no abnormal error rate, it is brand new.
>> But you could be right, of course.
>>
> I've tended to find that when a card is failing the MAC address starts
> setting itself to FF:FF:FF:FF:FF:FF not 00:00:00:XX:XX:XX

FF:FF:FF:FF:FF:FF is broadcast.

> The first three bytes are Vendor ID on a MAC address, you haven't got
> anything in there that might fiddle with that? Is it an OEM card?

Timo

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Re: [CentOS] security updates

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus Ritika Garg spake:
> I can't understand exactly what these security updates do? Why is there a
> need to have a security update?

YMMD.
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Re: [CentOS] yum update error

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus Timothy Murphy spake:
> For some reason all the perl man pages cause yum errors like
> -
> Transaction Check Error:
>   file /usr/share/man/man1/c2ph.1.gz from install of
>   perl-5.8.8-32.el5_5.2.x86_64 conflicts with file from package
>   perl-5.8.8-32.el5_5.1.i386
> -
> 
> 1. I don't really see how the man pages can cause conflicts;
> 2. More importantly, how should I deal with this?
> [I've updated everything else with yum --exclude=perl* update.]

Ran into this, too, recently. I don't know whether it's the
'recommended' way, but removing perl-5.8.8-32.el5_5.1.i386 (on a 64bit
machine), which was possible without removing anything else, and then
updating (which included the installion of perl-5.8.8-32.el5_5.2.x86_64
fixed it for me.

HTH,

Timo



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Re: [CentOS] In the press, once again

[Timo Schoeler]

thus Tom Bishop spake:
> +1 Just Awesome.ROFL.too funny :)
> 
> 
> Thanks for the link

Maybe stuff for then next newsletter...?

> On Fri, Sep 24, 2010 at 8:23 AM, Timo Schoeler
> wrote:
> 
>> May be a little bit off topic, but this gave me hard laugh:
>>
>> http://www.theregister.co.uk/2010/09/24/sysadmin_file_tools/
>>
>> Windows admins use a virtualized CentOS machine to copy files because
>> their own tools are not able to handle copying a bigger amount of data. :)
>>
>> Cheers,
>>
>> Timo
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[CentOS] In the press, once again

[Timo Schoeler]

May be a little bit off topic, but this gave me hard laugh:

http://www.theregister.co.uk/2010/09/24/sysadmin_file_tools/

Windows admins use a virtualized CentOS machine to copy files because
their own tools are not able to handle copying a bigger amount of data. :)

Cheers,

Timo
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Re: [CentOS] xen

[Timo Schoeler]

´>> If i will use nat on a xen vm what should i set in the config file?
>
> http://wiki.kartbuilding.net/index.php/Xen_Networking#Routed_Networking_with_NAT_2
>
> HTH,
>
> Timo

Sorry, I sent the Debian-side of life off my wiki.

There's CentOS-style stuff e.g. here:

http://www.nikhef.nl/pub/projects/grid/gridwiki/index.php/Xen_3.2,_CentOS_5.1_and_NAT_HOWTO

Timo
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Re: [CentOS] xen

[Timo Schoeler]

> If i will use nat on a xen vm what should i set in the config file?

http://wiki.kartbuilding.net/index.php/Xen_Networking#Routed_Networking_with_NAT_2

HTH,

Timo
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[CentOS] Amazon Linux AMI based on CentOS?

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Hi,

a german IT news site [0] today posted that Amazon Linux AMI is based on
CentOS 5.5 -- is that true?

Maybe this would be stuff for the next newsletter... ;)

Cheers,

Timo

http://www.golem.de/1009/78088.html
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Re: [CentOS] Software RAID + LVM + Grub

[Timo Schoeler]

On 09/18/2010 05:13 PM, Matthew Topper wrote:
> I'm playing with software RAID and LVM in some virtual machines and
> I've run into an issue that I can't find a good answer to in the docs.
>
> I have the following RAID setup:
>
> md0: sda1 and sdb1, RAID 1.  This is /boot
>
> md1: sda2 and sdb2, RAID 1.  This is a PV for LVM.
>
> VolGroup00, this is the volume group and md1 is the only PV in it.
>
> LogVol00 is swap
> LogVol01 is /
> LogVol02 is /home
>
> So, I tested to see what happens if I disable sdb in virtualbox.
> Machine booted find and I was able to see that part of the raid array
> was gone.
>
> I reattached the disk and rebuilt the array
> mdam --add /dev/md0 /dev/sdb1
> mdam --add /dev/md1 /dev/sdb2
>
> The array rebuilt without issue.  But now, if I remove sda, the machine
> doesn't boot and grub complains.  The question I have is how does one
> reinstall the boot sector at this point?  I'm a little confused as far
> as to what device to install it on and what to specify as the root.
>
> This is grub.conf if it helps:
>
> default=0
> timeout=5
> splashimage=(hd0,0)/grub/splash.xpm.gz
> title CentOS (2.6.18-194.e15)
>   root (hd0,0)
>   kernel /vmlinuz-2.6.18-194.e15 ro root=/dev/VolGroup00/LogVol01
>   initrd /initrd-2.6.18-194.e15.img
>
> Grub has always been a little confusing for me, so I guess I don't
> understand.  What do the two root entries specify?  And again, my main
> question is how do I reinstall grub to the repaired disk?  Sorry for
> the lengthy post, I'm trying to provide as much information as possible.

http://wiki.centos.org/HowTos/CentOS5ConvertToRAID#head-fa2b73a28acdf965daa1e018962eaa8cbd94110c

HTH,

Timo :)
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Re: [CentOS] bridge

[Timo Schoeler]

> In the host

Could you post you appropriate ifcfg scripts?

> -Original Message-
> From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On
> Behalf Of Timo Schoeler
> Sent: Friday, September 03, 2010 11:50 AM
> To: CentOS mailing list
> Subject: Re: [CentOS] bridge
>
>
>> For example
>> 2.6.18-194.8.1.el5.028stab070.4
>>
>> This is the openvz kernel
>
> True. So, where do you place the bridge, in the VE or in the host
> itself?
>
> Timo
>
>> -Original Message-
>> From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On
>> Behalf Of Timo Schoeler
>> Sent: Friday, September 03, 2010 11:43 AM
>> To: CentOS mailing list
>> Subject: Re: [CentOS] bridge
>>
>>
>>> I try to use a bridge with openvz but get the following Bridging
>>> Support is not available in this kernel This message are in all
>>> kernels i tryed from the centos yum repo On a frech 5.5 It has worked
>
>>> before With the same  install i have used
>>
>> Hi,
>>
>> so, you installed a fresh CentOS 5.5 and then added the OpenVZ repo
>> from
>>
>> their site?
>>
>> Which kernel did you try (of which you say it lacks bridge support)?
>>
>> Regards,
>>
>> Timo
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Re: [CentOS] bridge

[Timo Schoeler]

> For example
> 2.6.18-194.8.1.el5.028stab070.4
>
> This is the openvz kernel

True. So, where do you place the bridge, in the VE or in the host itself?

Timo

> -Original Message-
> From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On
> Behalf Of Timo Schoeler
> Sent: Friday, September 03, 2010 11:43 AM
> To: CentOS mailing list
> Subject: Re: [CentOS] bridge
>
>
>> I try to use a bridge with openvz but get the following Bridging
>> Support is not available in this kernel This message are in all
>> kernels i tryed from the centos yum repo On a frech 5.5 It has worked
>> before With the same  install i have used
>
> Hi,
>
> so, you installed a fresh CentOS 5.5 and then added the OpenVZ repo from
>
> their site?
>
> Which kernel did you try (of which you say it lacks bridge support)?
>
> Regards,
>
> Timo
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Re: [CentOS] bridge

[Timo Schoeler]

> I try to use a bridge with openvz but get the following Bridging Support
> is not available in this kernel This message are in all kernels i tryed
> from the centos yum repo On a frech 5.5 It has worked before With the
> same  install i have used

Hi,

so, you installed a fresh CentOS 5.5 and then added the OpenVZ repo from 
their site?

Which kernel did you try (of which you say it lacks bridge support)?

Regards,

Timo
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Re: [CentOS] how to install oracle on centos 5.3

[Timo Schoeler]

On 08/29/2010 03:52 PM, ganu MailList wrote:
> I donot know how to set
>
>
>
> kernel.shmmax=
> kernel.shmmni=
> kernel.shmall=
> kernel.sem=
> fs.file-max=

/etc/sysctl.conf

man sysctl will show you more information.

HTH,

Timo

> 2010/8/29 Hakan Koseoglu mailto:ha...@koseoglu.org>>
>
> Ganu,
>
> On 29 August 2010 12:03, ganu MailList  > wrote:
>  > I try to set the kernel parameters  but fails.
> We have gone over this before. Did you follow the documentation in
> Oracle's web site? What error do you get and while doing what?
>
> --
> Hakan (m1fcj) - http://www.hititgunesi.org
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Re: [CentOS] why flash the terminal interface when loading the linux system?

[Timo Schoeler]

On 08/28/2010 05:29 PM, ganu MailList wrote:
> I had set the initdefault  as 5

So, X11 should start up.

Could you elaborate your question? What's happening (or not happening)?

Timo
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Re: [CentOS] Cannot set MTU != 1500 on Intel NIC

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus Gordon Messmer spake:
> On 08/23/2010 09:22 AM, Timo Schoeler wrote:
>> I'm amused about PeeCee hardware (sorry, only half of a pun intended)...
>> There's those two NICs on board of a *server* grade machine, a 82573E
>> and a 82573L. One of them is just *broken* (see above).

Hi,

> Actually, both of them are broken.  One of them has a workaround 
> available for its brokenness.

yep, I read the driver's source (and hey, they do comment their code! ;)...

For me, it's dead silicon. I know, even CPUs may have hundreds of
errata, but shipping and selling crappy NIC chipsets is something that
collides with my universe.

YMMV, tho.

Timo
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Re: [CentOS] Cannot set MTU != 1500 on Intel NIC

[Timo Schoeler]

>> 0d:00.0 Ethernet controller: Intel Corporation 82573E Gigabit Ethernet
>> Controller (Copper) (rev 03)
>
> http://download.intel.com/design/network/specupdt/82573.pdf
> 17 ASPM/Jumbo Frames Disabled Due to Early Receive Threshold Overrun
>Buffer
> Status: Intel does not plan to resolve this erratum in the 82573
>Gigabit Ethernet Controller. Jumbo frames is not supported in
>82573E/V&  is supported with the workaround above in 82573L.

Interestingly, I somewhere got the same PDF (from the intel site) that 
required a password -- and didn't investigate further on your link. Now, 
out of curiosity, I did...

> You'll have to use different hardware.  The chipset you've got has a
> bug, and jumbo frame support is disabled as a result.

...and yes, you're right.

I'm amused about PeeCee hardware (sorry, only half of a pun intended)... 
There's those two NICs on board of a *server* grade machine, a 82573E 
and a 82573L. One of them is just *broken* (see above).

Cheers,

Timo
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Re: [CentOS] Cannot set MTU != 1500 on Intel NIC

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus JohnS spake:
> On Fri, 2010-08-20 at 10:17 +0200, Timo Schoeler wrote:
>> (from http://downloadmirror.intel.com/15817/eng/README.txt)
> ---
> I read that also.  Will they work without using the Intel Driver?  As in
> using the kernel driver in the kernel.  Seems to me it should because
> the e1000 is a fairly popular card.  

Sure, first I tried with the CentOS driver.

> Since you can't set the mtu you may benefit from setting the tcp values
> in sysctl.conf.

Nope, unfortunately I'm forced to have that MTU. However, we just
swapped the switch port using the Switch's management so that the NIC
that's able to do >1500 MTU get's the traffic in question.

So, I have a solution, but it doesn't solve the problem (regarding the
NIC itself)...

> John

Timo
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Re: [CentOS] Cannot set MTU != 1500 on Intel NIC

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus JohnS spake:
> On Fri, 2010-08-20 at 09:36 +0200, Timo Schoeler wrote:
> 
>> I tried with Intel's most recent driver, it shows the same behaviour:
>>
>> [r...@bla ~]# ip link set dev eth0 mtu 1576
>> SIOCSIFMTU: Invalid argument
>> [r...@bla ~]# ip link set dev eth1 mtu 1576
>> [r...@bla ~]# ip link show dev eth1
>> 6: eth1:  mtu 1576 qdisc pfifo_fast
>> qlen 1000
>> link/ether 00:30:48:xx:xx:xy brd ff:ff:ff:ff:ff:ff
> 
> Try with "ethtool"

Doesn't work either.

>>> While the first device (seen as eth0) does *not* allow to set a
>>> different MTU (tried with 1576 and 1546, both values I could use; I am
>>> forced to use values >1500 here due to protocol stuff), the second works
>>> without a problem.
> 
> Some e1000 cards do not even have support for jumbo frames.   Just maybe
> if yours is that case you may not be able to raise the mtu value no
> higher than 1500.

I saw this:

  82573(V/L/E) TX Unit Hang Messages
  --
  Several adapters with the 82573 chipset display "TX unit hang" messages
  during normal operation with the e1000e driver. The issue appears both
with
  TSO enabled and disabled, and is caused by a power management function
that
  is enabled in the EEPROM. Early releases of the chipsets to vendors
had the
  EEPROM bit that enabled the feature. After the issue was discovered newer
  adapters were released with the feature disabled in the EEPROM.

  If you encounter the problem in an adapter, and the chipset is an
82573-based
  one, you can verify that your adapter needs the fix by using ethtool:

  # ethtool -e eth0
  Offset  Values
  --  --
  0x  00 12 34 56 fe dc 30 0d 46 f7 f4 00 ff ff ff ff
  0x0010  ff ff ff ff 6b 02 8c 10 d9 15 8c 10 86 80 de 83
   ^^
  The value at offset 0x001e (de) has bit 0 unset. This enables the
problematic
  power saving feature. In this case, the EEPROM needs to read "df" at
offset
  0x001e.

  A one-time EEPROM fix is available as a shell script. This script will
verify
  that the adapter is applicable to the fix and if the fix is needed or
not. If
  the fix is required, it applies the change to the EEPROM and updates the
  checksum. The user must reboot the system after applying the fix if
changes
  were made to the EEPROM.

(from http://downloadmirror.intel.com/15817/eng/README.txt)

However, the card is okay, I didn't need to fix it.

I also had a look at the driver's source code, what still puzzles me
after reading this is that the other card on board *works*:

(...)

case e1000_82573:
case e1000_82574:
case e1000_82583:
/* Disable ASPM L0s due to hardware errata */
e1000e_disable_aspm(adapter->pdev, PCIE_LINK_STATE_L0S);

if (pdev->device == E1000_DEV_ID_82573L) {
adapter->flags |= FLAG_HAS_JUMBO_FRAMES;
adapter->max_hw_frame_size = DEFAULT_JUMBO;
}
break;
default:
break;
}

return 0;
}

(...)

static struct e1000_info e1000_82573_info = {
.mac= e1000_82573,
.flags  = FLAG_HAS_HW_VLAN_FILTER
  | FLAG_HAS_WOL
  | FLAG_APME_IN_CTRL3
  | FLAG_RX_CSUM_ENABLED
  | FLAG_HAS_SMART_POWER_DOWN
  | FLAG_HAS_AMT
  | FLAG_HAS_SWSM_ON_LOAD,
.pba= 20,
.max_hw_frame_size  = ETH_FRAME_LEN + ETH_FCS_LEN,
.init_ops   = e1000_init_function_pointers_82571,
.get_variants   = e1000_get_variants_82571,
};

(...)

/* 82573 Errata 17 */
if (((adapter->hw.mac.type == e1000_82573) ||
 (adapter->hw.mac.type == e1000_82574)) &&
(max_frame > ETH_FRAME_LEN + ETH_FCS_LEN)) {
adapter->flags2 |= FLAG2_DISABLE_ASPM_L1;
e1000e_disable_aspm(adapter->pdev, PCIE_LINK_STATE_L1);
}

(...)

> John

Timo
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Re: [CentOS] Cannot set MTU != 1500 on Intel NIC

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus Timo Schoeler spake:
> Hi list,

Little followup,

> I have a *very* strange problem, unfortunately it's kind of a show
> stopper regarding the deployment of the machine. :(
> 
> I have two Intel Gigabit Ethernet NICs on board (Supermicro-based
> Server), quoting lspci (full output see at the end of the email):
> 
> 0d:00.0 Ethernet controller: Intel Corporation 82573E Gigabit Ethernet
> Controller (Copper) (rev 03)
> 0f:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet
> Controller

I tried with Intel's most recent driver, it shows the same behaviour:

[r...@bla ~]# ip link set dev eth0 mtu 1576
SIOCSIFMTU: Invalid argument
[r...@bla ~]# ip link set dev eth1 mtu 1576
[r...@bla ~]# ip link show dev eth1
6: eth1:  mtu 1576 qdisc pfifo_fast
qlen 1000
link/ether 00:30:48:xx:xx:xy brd ff:ff:ff:ff:ff:ff

Timo

> While the first device (seen as eth0) does *not* allow to set a
> different MTU (tried with 1576 and 1546, both values I could use; I am
> forced to use values >1500 here due to protocol stuff), the second works
> without a problem.
> 
> dmesg shows:
> 
> eth0: Unsupported MTU setting
> ADDRCONF(NETDEV_UP): eth0: link is not ready
> eth1: changing MTU from 1500 to 1576
> ADDRCONF(NETDEV_UP): eth1: link is not ready
> 802.1Q VLAN Support v1.8 Ben Greear 
> All bugs added by David S. Miller 
> ADDRCONF(NETDEV_UP): eth0.543: link is not ready
> ADDRCONF(NETDEV_UP): eth0.820: link is not ready
> e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
> ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
> ADDRCONF(NETDEV_CHANGE): eth0.543: link becomes ready
> ADDRCONF(NETDEV_CHANGE): eth0.820: link becomes ready
> e1000e: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
> ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
> 
> The MTU is set as usual in the ifcfg-ethN files as 'MTU=1576', e.g.
> 
> I tried with kernel 2.6.18-194.8.1.el5.028stab070.2 (OpenVZ) as well as
> the vanilla CentOS kernels 2.6.18-194.8.1.el5 and 2.6.18-194.11.1.el5 --
> same problem.
> 
> Has anybody an idea what goes wrong here?
> 
> Thanks,
> 
> Timo
> 
> ---
> 
> 0d:00.0 Ethernet controller: Intel Corporation 82573E Gigabit Ethernet
> Controller (Copper) (rev 03)
> Subsystem: Super Micro Computer Inc Unknown device 108c
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr+ Stepping- SERR+ FastB2B-
> Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
> SERR-  Latency: 0, Cache Line Size: 64 bytes
> Interrupt: pin A routed to IRQ 90
> Region 0: Memory at d020 (32-bit, non-prefetchable) [size=128K]
> Region 2: I/O ports at 2000 [size=32]
> Capabilities: [c8] Power Management version 2
> Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
> PME(D0+,D1-,D2-,D3hot+,D3cold+)
> Status: D0 PME-Enable- DSel=0 DScale=1 PME-
> Capabilities: [d0] Message Signalled Interrupts: 64bit+
> Queue=0/0 Enable+
> Address: fee01000  Data: 405a
> Capabilities: [e0] Express Endpoint IRQ 0
> Device: Supported: MaxPayload 256 bytes, PhantFunc 0,
> ExtTag-
> Device: Latency L0s <512ns, L1 <64us
> Device: AtnBtn- AtnInd- PwrInd-
> Device: Errors: Correctable+ Non-Fatal+ Fatal+ Unsupported+
> Device: RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
> Device: MaxPayload 128 bytes, MaxReadReq 512 bytes
> Link: Supported Speed 2.5Gb/s, Width x1, ASPM unknown,
> Port 0
> Link: Latency L0s <128ns, L1 <64us
> Link: ASPM Disabled RCB 64 bytes CommClk+ ExtSynch-
> Link: Speed 2.5Gb/s, Width x1
> Capabilities: [100] Advanced Error Reporting
> Capabilities: [140] Device Serial Number xy-xx-xx-ff-ff-48-30-00
> 
> 0f:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet
> Controller
> Subsystem: Super Micro Computer Inc Unknown device 109a
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr+ Stepping- SERR+ FastB2B-
> Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
> SERR-  Latency: 0, Cache Line Size: 64 bytes
> Interrupt: pin A routed to IRQ 106
> Region 0: Memory at d030 (32-bit, non-prefetchable) [size=128K]
> Region 2: I/O ports at 3000 [size=32]
> Capabilities: [c8] Power Management version 2
> Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
> PME(D0+,D1-,D2-,D3hot+,D3cold+)
>

[CentOS] Cannot set MTU != 1500 on Intel NIC

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Hi list,

I have a *very* strange problem, unfortunately it's kind of a show
stopper regarding the deployment of the machine. :(

I have two Intel Gigabit Ethernet NICs on board (Supermicro-based
Server), quoting lspci (full output see at the end of the email):

0d:00.0 Ethernet controller: Intel Corporation 82573E Gigabit Ethernet
Controller (Copper) (rev 03)
0f:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet
Controller

While the first device (seen as eth0) does *not* allow to set a
different MTU (tried with 1576 and 1546, both values I could use; I am
forced to use values >1500 here due to protocol stuff), the second works
without a problem.

dmesg shows:

eth0: Unsupported MTU setting
ADDRCONF(NETDEV_UP): eth0: link is not ready
eth1: changing MTU from 1500 to 1576
ADDRCONF(NETDEV_UP): eth1: link is not ready
802.1Q VLAN Support v1.8 Ben Greear 
All bugs added by David S. Miller 
ADDRCONF(NETDEV_UP): eth0.543: link is not ready
ADDRCONF(NETDEV_UP): eth0.820: link is not ready
e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
ADDRCONF(NETDEV_CHANGE): eth0.543: link becomes ready
ADDRCONF(NETDEV_CHANGE): eth0.820: link becomes ready
e1000e: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready

The MTU is set as usual in the ifcfg-ethN files as 'MTU=1576', e.g.

I tried with kernel 2.6.18-194.8.1.el5.028stab070.2 (OpenVZ) as well as
the vanilla CentOS kernels 2.6.18-194.8.1.el5 and 2.6.18-194.11.1.el5 --
same problem.

Has anybody an idea what goes wrong here?

Thanks,

Timo

- ---

0d:00.0 Ethernet controller: Intel Corporation 82573E Gigabit Ethernet
Controller (Copper) (rev 03)
Subsystem: Super Micro Computer Inc Unknown device 108c
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr+ Stepping- SERR+ FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
SERR- TAbort-
SERR- http://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] need help about top command and this deb ug message

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
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thus adrian kok spake:
> Hi all
> 
> When I run top command, it suddenly shows one message and few second shows 
> another one
> 
> 
> debug2: channel 0: window 31129 sent adjust 34407
> 
> What is this?
> 
> Thank you

First thought: Kernel tells you about TCP Window Size Adjustment

HTH,

Timo
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Re: [CentOS] Iptables questions

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
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thus Eero Volotinen spake:
 I have  a server sitting right on the net and the constant barrage of 100s
>> of
  Ips trying thousands of times at port 22 is insane.
>>> You're quite sane.  Anyone likely to hit your ssh at its new port is likely
>>> to try port 22 first.  So if they show up there first, blocking them is good
>>> - unless you have  legitimate users who may forget to go to your special 
>>> port
>>> and so get locked  out after trying the default port first.
>> There's also port knocking...
> 
> how about enabling ssh login only with public keys ?

What about using a different port, if narrowing down the networks/hosts
*allowed* to connect to the machine is not an option, as it seems?

Timo

> --
> Eero,
> RHCE
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Re: [CentOS] Encrypted remote backup?

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus Michael A. Peters spake:
> Can anyone recommend a commercial off site remote backup service with a 
> client (preferably FOSS) for CentOS 5, preferably that allows encryption 
> of the data being backed up?
> 
> Small scale, I'm primarily looking to just back up my mail folder on my 
> server.
> 
> I've been backing it up to local hd via rsync but that drive just died, 
> I'd prefer to have it backed up to somewhere more stable than a home box 
> and automated via cron (cli tools a must), but encryption is important, 
> people are snoopy and I'm paranoid about that sort of stuff.

I'd like to recommend duplicity. I have it running at my employers site
for multiple customers with each one backup up data in the TiByte+
range. Works like a charm.

http://wiki.centos.org/Newsletter/1003#head-95339dd68454e3625bedea8ee587fdf5ee092b28

HTH,

Timo
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Re: [CentOS] centos 5.2

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus Roland RoLaNd spake:
> Hello,
> 
> where can i get centos 5.2 64 bit ?
> all i can find is 5.5 ...
> any help?

http://vault.centos.org/5.2/isos/

HTH,

Timo
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=giy/
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Re: [CentOS] where to download CENTOS 5.5 DVD version?

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
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thus mcclnx mcc spake:
> I want to CENTOS download side and tried to download CENTOS 5.5 X86_64 DVD 
> version.  I can NOT find on any site.
> 
> Any ideal?

http://www.centos.org/modules/tinycontent/index.php?id=30

Check for your region and be sure that the mirror provides a DVD iso.

> Thanks.

HTH,

Timo
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=u0yv
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Re: [CentOS] Formatting file system too slow on CentOS

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus David Suhendrik spake:
> @Rajagopal:
> 
> This result:
> # hdparm -tT /dev/hda5
> 
> /dev/hda5:
>   Timing cached reads:   9952 MB in  2.00 seconds = 4980.51 MB/sec
>   Timing buffered disk reads:8 MB in  3.08 seconds =   2.60 MB/sec
> 
> @Timo:
> 
> 458930-B21 HP 750GB 7.2k HP MDL SATA
> 
> I don't have idea for this case :(

Hm, says that's *not* a 4K drive, so this is not the source for the
problem. Would have been too easy...

Timo

> --
> Best regards,
> David
> http://blog.pnyet.web.id
> 
> 
> On 05/10/2010 03:19 PM, Timo Schoeler wrote:
> thus David Suhendrik spake:
>
>>>> Dear All,
>>>> I've a new server HP DL 180 G6 with quad core processor, ram 4 GB, hdd
>>>> (WDC) 1x750GB Sata.
>>>> I was confused when installing CentOS 5 64bit on that server, I take
>>>> about two hours to format the ext3 file system. is this normal?
>>>>  
> Hi,
> 
> could you provide the exact model number of that HD?
> 
> I think it could be a 4K issue. We ran into this, too, some months ago:
> 
> http://www.hv23.net/2010/02/wd10ears-performance-larger-block-size-issues4k/
> 
> HTH,
> 
> Timo
> 
>
>>>> Because when I compare with other sata hard drive in another computer
>>>> file system format is not too long like that.
>>>> And when I copy the file on the local hard drive for longer time when
>>>> compared with the copy of the file on another server.
>>>>
>>>> How to debug on this issue?
>>>>
>>>> --
>>>> Best regards,
>>>> David
>>>> http://blog.pnyet.web.id
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=TKJF
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Re: [CentOS] Formatting file system too slow on CentOS

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus David Suhendrik spake:
> Dear All,
> I've a new server HP DL 180 G6 with quad core processor, ram 4 GB, hdd 
> (WDC) 1x750GB Sata.
> I was confused when installing CentOS 5 64bit on that server, I take 
> about two hours to format the ext3 file system. is this normal?

Hi,

could you provide the exact model number of that HD?

I think it could be a 4K issue. We ran into this, too, some months ago:

http://www.hv23.net/2010/02/wd10ears-performance-larger-block-size-issues4k/

HTH,

Timo

> Because when I compare with other sata hard drive in another computer 
> file system format is not too long like that.
> And when I copy the file on the local hard drive for longer time when 
> compared with the copy of the file on another server.
> 
> How to debug on this issue?
> 
> --
> Best regards,
> David
> http://blog.pnyet.web.id

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=yg+z
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Re: [CentOS] RHEL 6 Beta available for public download

[Timo Schoeler]

Niki Kovacs wrote:
> Mogens Kjaer a écrit :
>> On 04/23/2010 02:52 PM, Niki Kovacs wrote:
>> ...
>>> Machine 2 : installer goes a little further, asks about the storage, and 
>>> when I choose the default, it freezes.
>> I had to boot the installer with nmi_watchdog=0 to avoid it
>> to freeze during installation.
>>
> 
> Where do you get this sort of install option from ?

Append it to the kernel boot options; it's not an installer option, it's
a kernel option. See e.g.

http://centos.org/modules/newbb/viewtopic.php?topic_id=23135&forum=37

HTH,

Timo
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Re: [CentOS] RHEL 6 Beta available for public download

[Timo Schoeler]

Hi,

On 04/21/2010 04:25 PM, Hakan Koseoglu wrote:
> On Wed, Apr 21, 2010 at 1:39 PM, Michel van Deventer
>   wrote:
>> And now it works :) happy downloading ;)
> Too many users already!

for whatever reason I see images appearing in here

http://www.riscworks.net/CentOS/RHEL6_Beta/

ppc is already there; x86_64 will only take some more minutes. Don't 
know when i386 will be there, tho.

> They should invest on a proper OS from Redmond! :)

LOL

Cheers,

Timo
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Re: [CentOS] RHEL 6 Beta available for public download

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus b.j. mcclure spake:
> 
> 
>> http://press.redhat.com/2010/04/21/red-hat-enterprise-linux-6-beta-available-today-for-public-download/
>>
>> ...says it all.
>>
>> Have phun!
>>
>> Timo
> 
> Hmmm.  I get a 505.

Dito, saw just after sending here. I think they'll fix it ASAP, tho.

> B.J.

Timo

> CentOS 5.4, Linux 2.6.18-164.15.1.el5 x86_64 07:55:04 up 1 day, 22:25, 1
> user, load average: 0.09, 0.14, 0.16

(Is that an invitation for hackers? ;)
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[CentOS] RHEL 6 Beta available for public download

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

http://press.redhat.com/2010/04/21/red-hat-enterprise-linux-6-beta-available-today-for-public-download/

...says it all.

Have phun!

Timo
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Re: [CentOS] Viewing the NTP Server configured

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus Wahyu Darmawan spake:
> You can use /var/log/messages info for your synchronized time server.
> 
> 
> On Thu, Apr 15, 2010 at 3:40 PM, Jatin Davey  wrote:
>> How do i know which NTP server is my linux box contacting to synchronize
>> its time with that of the server ?
>>
>> Thanks
>> Jatin

A detailed listing can be created by issuing

ntpq -c peers

HTH,

Timo
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Re: [CentOS] Slightly OT: which hardware for CentOS file server (Samba, 2 To storage, 50 users)?

[Timo Schoeler]

thus On 04/12/2010 06:50 PM, Gé Weijers spake:

> 50 simultaneous users will require more than a bargain desktop PC.

Please don't top post...

Yes -- 50 not too lazy users will kill the machine.

> I would go for low-end server hardware, which will get you ECC memory
> and more SATA ports. The cost is probably not significantly more than a
> _good_ quality desktop system.

ECC is mandatory in decent machines, be it workstations or servers, IMHO.

Think of a faulty stick of RAM you don't discover immediately, it might 
shred all your Terabytes of data.

> You may want to allow for some expansion, 2 To may grow into 3 To over
> time. Also plan for backups. You may want to use LVM and leave some disk
> space unallocated to you can create snapshots and make backups to
> external USB drives or another network server while the system is up and
> running.
>
> My personal criteria:
> - decent power supply
> - space for 4 3.5" hard drives.
> - 4 memory slots, so I can go to 8 Go memory without breaking the bank
> - at least a dual-core Xeon or AMD processor which supports ECC memory

Almost every not too crappy mother board will allow ECC using an AMD CPU 
(Phenom et al). To get ECC in intel space, you'll have to pay *much* more.

> - 4 or more available SATA ports on the motherboard
> - 1-2 1000BASE-T network interfaces.

Maybe, search for a (used) server on eBay or elsewhere. You can get very 
decent machines with all the features or more (ECC, many memory slots, 
dual, redundant power supplies, even out-of-band management) at a very 
low price. Keep in mind that those machines *are* loud. (You have a 
closet/rack to keep it, don't you?)

> You could go for a RAID controller, but RAID1 (mirroring) has little
> overhead in software, and you can buy 2 extra hard disks for the price
> of the controller.

Maybe for future growth you'll want to keep in mind that you could go 
RAID6. RAID5 is evil, taking todays hard drive sizes in mind (speaking 
of 2TiByte drives, especially).

> Gé (from cloudy Nevada)

HTH,

Timo (from sunny Berlin)

> On Mon, 12 Apr 2010, Niki Kovacs wrote:
>
>> Hi,
>>
>> The language lab from the local university has contacted me. They'd like
>> to have a low-cost file server for storing all their language video
>> files. They have a mix of Windows, Mac OS X and even Linux clients,
>> roughly 50 machines. The files are quite big, and they calculated a
>> total amount of 2 To of storage.
>>
>> I'm not very proficient with hardware, meaning either I'm dealing with
>> remote servers in some datacenter, or otherwise I install CentOS
>> desktops on any hardware people throw at me.
>>
>> Since the aim is lowcost, would it be wrong to install that fileserver
>> on a no-name desktop PC with a 64bit processor and enough RAM, and then
>> simply put 2 x 2 To hard disks in it, either with a mirroring RAID (can
>> never remember which does what in 0, 1 and 5) or some rsync script
>> regularly copying over the first disk to the second? Or do you have
>> something more apt to suggest?
>>
>> Cheers from South France,
>>
>> Niki

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Re: [CentOS] is skype using encryption?

[Timo Schoeler]

On 04/10/2010 04:55 PM, Jozsi Vadkan wrote:
> Can someone [same subnet, e.g.: with a hub, not switch..] sniff my skype
> password when i'm using Skype?

Nope.

> Is it encrypted?

Yupp...

> Thank you for the info

For more information, check this:

http://www.theregister.co.uk/2009/02/12/nsa_offers_billions_for_skype_pwnage/

http://www.ossir.org/windows/supports/2005/2005-11-07/EADS-CCR_Fabrice_Skype.pdf

HTH,

Timo
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Re: [CentOS] replacement for start-stop-daemon on CentOS

[Timo Schoeler]

>> Do you have some more details, e.g. gcc's fall-out (error
>> messages)?
>
> Sorry, output is in german on my machine
>
> start-stop-daemon.c: In function »do_help«: start-stop-daemon.c:113:
> Fehler: fehlendes abschließendes Zeichen " start-stop-daemon.c:116:
> Fehler: expected »)« before »start« start-stop-daemon.c:116: Fehler:
> verirrtes »\« im Programm start-stop-daemon.c:116: Fehler: verirrtes
> »\« im Programm start-stop-daemon.c:116: Fehler: verirrtes »\« im
> Programm start-stop-daemon.c:116: Fehler: verirrtes »\« im Programm
> start-stop-daemon.c:116: Fehler: verirrtes »\« im Programm
> start-stop-daemon.c:122: Fehler: verirrtes »\« im Programm
> start-stop-daemon.c:122: Fehler: verirrtes »\« im Programm
> start-stop-daemon.c:124:48: Warnung: Zeichenkonstante zu lang für
> ihren Typ start-stop-daemon.c:122: Fehler: verirrtes »\« im Programm
> start-stop-daemon.c:122: Fehler: verirrtes »\« im Programm
> start-stop-daemon.c:122: Fehler: verirrtes »\« im Programm
> start-stop-daemon.c:122: Fehler: verirrtes »\« im Programm
> start-stop-daemon.c:122: Fehler: verirrtes »\« im Programm
> start-stop-daemon.c:122: Fehler: fehlendes abschließendes Zeichen "
> start-stop-daemon.c:133: Fehler: expected »;« before »}« token
>
>
> Timothy
>
> P.S. perhaps you are a german?

Indeed I am, however I have to say that I don't understand what gcc
wants to tell us.

Could you provide the lines 110 to 140 of start-stop-daemon.c?

Timo
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Re: [CentOS] replacement for start-stop-daemon on CentOS

[Timo Schoeler]

thus Timothy Kesten spake:
> Hi Folks,
>
> I'd like to use  "start-stop-daemon" on my centos-machine.
> I know , it's debian-like.
> But I can't find "startproc" on my machine nor in the repos.
>
> What is the CentOS-replacement for "start-stop-daemon"?
>
> Thx
>
> Timothy
>
> P.S. I found a  start-stop-daemon.c  script - but how to compile it?
>
>   gcc start-stop-daemon.c
>
> ends in much errors.

Do you have some more details, e.g. gcc's fall-out (error messages)?

Timo
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Re: [CentOS] Release 6?

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus Paul Stuffins spake:
> Has RedHat even released RHEL6?

Nope. But it's all over town that Red Hat might conduct one or more
public (!) beta tests of RHEL within the next several weeks (mind Red
Hat Summit in June).

Timo
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Re: [CentOS] Running commercial softwares on CentOS

[Timo Schoeler]

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thus James A. Peltier spake:
> On Mon, 29 Mar 2010, Rahul Tidke wrote:
> 
> 
> 
>> I agree with above facts. But, how do Red Hat provides interoperability in
>> its desktop edition http://www.redhat.com/rhel/desktop/ ? It says that it
>> supports third party apps and MS apps/environment. What software and
>> technologies are used in RHEL for this? I just want to explore the
>> possibilities for using CentOS as a full fledged desktop OS. I have been
>> using CentOS as a server since very long time.
>>
>> Rahul.
> 
> Red Hat uses Wine, but only to support the most commonly used Windows 
> applications like Office, Photoshop, etc.  Engineering applications like 
> AutoCAD are not your "typical" application set and are not but a single 
> blip on the radar.
> 
> Install Windows on KVM and try your apps.  That's the best answer I have 
> for you or that you are likely to get.  I tried it before, a bit over a 
> year ago and it completely sucked (due to reasons stated before).
> 
> I have been using UNIX, BSD and GNU/Linux as a desktop OS for over 10 
> years.  I don't do CAD/Visualization frequently, but when I do I use 
> Windows on hardware.

Ten years ago the last stanza would have been different; remember Sun,
SGI, and HP hardware. (Well, some people still use Solaris and HP-UX for
such purposes today, I recently saw a TV documentary about glaciers
where on of the scientists show some technical stuff on an C8000 :).

Timo

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Re: [CentOS] Patched KVM RPMs (solves 'network shutdown under heavy load')

[Timo Schoeler]

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thus Timo Schoeler spake:
> thus Farkas Levente spake:
>> On 03/22/2010 12:12 PM, Timo Schoeler wrote:
>>> -BEGIN PGP SIGNED MESSAGE-
>>> Hash: SHA1
>>>
>>> thus Farkas Levente spake:
>>>> On 03/22/2010 12:03 PM, Timo Schoeler wrote:
>>>>> Hi list,
>>>>>
>>>>> due to the necessity of having a patched KVM running, I build some new
>>>>> RPMs. However, only
>>>>>
>>>>> kmod-kvm-83-105.27.x86_64.rpm
>>>>>
>>>>> is important to replace the 'original' one as it's the only package that
>>>>> contains the patch. I didn't rename the packages, though, hopefully in
>>>>> order not to break the upgrade path provided to us.
>>>>>
>>>>> The patch adresses following problem:
>>>>>
>>>>> 'Fix a race condition where qemu finds that there are not enough virtio
>>>>> ring buffers available and the guest make more buffers available before
>>>>> qemu can enable notifications.' [0], the thread startet as 'network
>>>>> shutdown under heavy load' [1].
>>>>>
>>>>> KVM already contains the fix (since February 19th, IIRC), CentOS'
>>>>> packages doesn't.
>>>>>
>>>>> The RPMs can be found here:
>>>>>
>>>>> http://www.riscworks.net/CentOS/KVM/fix-virt-io-ring-buffer-race/
>>>> does it have an upstream (redhat) bugzilla entry?
>>>> it'd be better if they fix it...
>>> Sure, but we had the problem that it constantly crashed several
>>> customer's domUs, so we had to fix it ASAP. Just wanted to make it more
>>> convenient for people that have the same problem and can _not_ wait
>>> until it's fixed upstream.
>> then at least and src.rpm would be useful...
> 
> Okay, I'll see when I got time to create one...
> 
> Timo

Done, can be found in

http://www.riscworks.net/CentOS/KVM/fix-virt-io-ring-buffer-race/SRPM

now.

Timo
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Re: [CentOS] Patched KVM RPMs (solves 'network shutdown under heavy load')

[Timo Schoeler]

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thus Karanbir Singh spake:
> On 22/03/2010 11:36, Timo Schoeler wrote:
> 
>> it seems dead (at least, for me):
>>
>> http://lists.centos.org/pipermail/centos/2010-March/091952.html
>>
> 
> did you report that to the list-owner address ?

Done.

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Re: [CentOS] Patched KVM RPMs (solves 'network shutdown under heavy load')

[Timo Schoeler]

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thus Karanbir Singh spake:
> On 22/03/2010 11:36, Timo Schoeler wrote:
> 
>> it seems dead (at least, for me):
>>
>> http://lists.centos.org/pipermail/centos/2010-March/091952.html
>>
> 
> did you report that to the list-owner address ?

Nope, not yet, over the weekend I was online using a tiny Nokia E71,
so... I was lazy.

Timo

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Re: [CentOS] Patched KVM RPMs (solves 'network shutdown under heavy load')

[Timo Schoeler]

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thus Karanbir Singh spake:
> On 22/03/2010 11:20, Timo Schoeler wrote:
>>>>>> due to the necessity of having a patched KVM running, I build some new
>>>>>> RPMs. However, only
>>>>>>
>>>>>> kmod-kvm-83-105.27.x86_64.rpm
>>>>>>
> 
> these sort of things would be better passed in through the centos-virt 
> list ( http://lists.centos.org/ )

Hi,

it seems dead (at least, for me):

http://lists.centos.org/pipermail/centos/2010-March/091952.html

Timo
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Re: [CentOS] Patched KVM RPMs (solves 'network shutdown under heavy load')

[Timo Schoeler]

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thus Farkas Levente spake:
> On 03/22/2010 12:12 PM, Timo Schoeler wrote:
>> -BEGIN PGP SIGNED MESSAGE-
>> Hash: SHA1
>>
>> thus Farkas Levente spake:
>>> On 03/22/2010 12:03 PM, Timo Schoeler wrote:
>>>> Hi list,
>>>>
>>>> due to the necessity of having a patched KVM running, I build some new
>>>> RPMs. However, only
>>>>
>>>> kmod-kvm-83-105.27.x86_64.rpm
>>>>
>>>> is important to replace the 'original' one as it's the only package that
>>>> contains the patch. I didn't rename the packages, though, hopefully in
>>>> order not to break the upgrade path provided to us.
>>>>
>>>> The patch adresses following problem:
>>>>
>>>> 'Fix a race condition where qemu finds that there are not enough virtio
>>>> ring buffers available and the guest make more buffers available before
>>>> qemu can enable notifications.' [0], the thread startet as 'network
>>>> shutdown under heavy load' [1].
>>>>
>>>> KVM already contains the fix (since February 19th, IIRC), CentOS'
>>>> packages doesn't.
>>>>
>>>> The RPMs can be found here:
>>>>
>>>> http://www.riscworks.net/CentOS/KVM/fix-virt-io-ring-buffer-race/
>>> does it have an upstream (redhat) bugzilla entry?
>>> it'd be better if they fix it...
>> Sure, but we had the problem that it constantly crashed several
>> customer's domUs, so we had to fix it ASAP. Just wanted to make it more
>> convenient for people that have the same problem and can _not_ wait
>> until it's fixed upstream.
> 
> then at least and src.rpm would be useful...

Okay, I'll see when I got time to create one...

Timo
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Re: [CentOS] Patched KVM RPMs (solves 'network shutdown under heavy load')

[Timo Schoeler]

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thus Farkas Levente spake:
> On 03/22/2010 12:03 PM, Timo Schoeler wrote:
>> Hi list,
>>
>> due to the necessity of having a patched KVM running, I build some new
>> RPMs. However, only
>>
>> kmod-kvm-83-105.27.x86_64.rpm
>>
>> is important to replace the 'original' one as it's the only package that
>> contains the patch. I didn't rename the packages, though, hopefully in
>> order not to break the upgrade path provided to us.
>>
>> The patch adresses following problem:
>>
>> 'Fix a race condition where qemu finds that there are not enough virtio
>> ring buffers available and the guest make more buffers available before
>> qemu can enable notifications.' [0], the thread startet as 'network
>> shutdown under heavy load' [1].
>>
>> KVM already contains the fix (since February 19th, IIRC), CentOS'
>> packages doesn't.
>>
>> The RPMs can be found here:
>>
>> http://www.riscworks.net/CentOS/KVM/fix-virt-io-ring-buffer-race/
> 
> does it have an upstream (redhat) bugzilla entry?
> it'd be better if they fix it...

Sure, but we had the problem that it constantly crashed several
customer's domUs, so we had to fix it ASAP. Just wanted to make it more
convenient for people that have the same problem and can _not_ wait
until it's fixed upstream.

Timo
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[CentOS] Patched KVM RPMs (solves 'network shutdown under heavy load')

[Timo Schoeler]

Hi list,

due to the necessity of having a patched KVM running, I build some new
RPMs. However, only

kmod-kvm-83-105.27.x86_64.rpm

is important to replace the 'original' one as it's the only package that
contains the patch. I didn't rename the packages, though, hopefully in
order not to break the upgrade path provided to us.

The patch adresses following problem:

'Fix a race condition where qemu finds that there are not enough virtio
ring buffers available and the guest make more buffers available before
qemu can enable notifications.' [0], the thread startet as 'network
shutdown under heavy load' [1].

KVM already contains the fix (since February 19th, IIRC), CentOS'
packages doesn't.

The RPMs can be found here:

http://www.riscworks.net/CentOS/KVM/fix-virt-io-ring-buffer-race/

Best,

Timo

[0] -- http://marc.info/?l=kvm&m=126564542625725&w=2

[1] -- http://www.mail-archive.com/k...@vger.kernel.org/msg26033.html

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Re: [CentOS] Looking for experiences with filesystem choices....

[Timo Schoeler]

On 03/21/2010 04:01 PM, Tom Bishop wrote:
> Lots of opinions out there and I have read and read, so I have a home
> server that I have finally setup with a hot swap hdd cage and what I am
> planning on doing is copying my data drive every other day and rotating
> them offsite, haven't figured out how often though.  So I did my first
> test last night and the backup drive was formatted with ext3 but looking
> to try to speed things up and was wondering what would be my best
> choice.  Most of my data is on VM's and the hdd files on some of them
> are quite large, I have used JFS and reiser in the past and was leaning
> on going with JFS but am tempted to look at XFS.  So what I was
> wondering are what are folks experiences (instead of opinions) with
> different filesystems and while I want speed it needs to be reliable
> since it will be my back up datarunning centos 5.4 x64
>
>
> Thanks in advance...

Hi,

in December last year there was a nice thread about choosing the 'right' 
FS for certain circumstances, which included JFS, XFS, ext3/4 etc.

http://lists.centos.org/pipermail/centos/2009-December/086842.html

HTH,

Timo
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[CentOS] [Admins] centos-virt mailing list dead?

[Timo Schoeler]

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Hi (admins),

maybe it'd be worth a check if there's something wrong; list's last
activity is about two days ago [0], two emails I sent yesterday were
delivered [1], but didn't appear on the list/in the archives.

Cheers,

Timo

[0] -- http://lists.centos.org/pipermail/centos-virt/2010-March/thread.html

[1] --

1st try:
Mar 19 13:43:32 tydirium postfix/smtp[8285]: 092C62B4B5B:
to=, relay=mail.centos.org[72.26.200.202]:25,
delay=1.7, delays=0.14/0.05/0.68/0.81, dsn=2.0.0, status=sent (250 2.0.0
Ok: queued as D746167981)

2nd try:
Mar 19 15:18:47 tydirium postfix/smtp[8998]: 26FD62B4B9E:
to=, relay=mail.centos.org[72.26.200.202]:25,
delay=1.3, delays=0.18/0.05/0.44/0.62, dsn=2.0.0, status=sent (250 2.0.0
Ok: queued as CD4C567B5B)
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Re: [CentOS] APIC error on Intel Atom CPU, CentOS 5.x

[Timo Schoeler]

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thus Bill Campbell spake:
> On Tue, Mar 16, 2010, Timo Schoeler wrote:
>> -BEGIN PGP SIGNED MESSAGE-
>> Hash: SHA1
>>
>> thus JohnS spake:
>>> On Mon, 2010-03-15 at 19:13 -0700, Bill Campbell wrote:
>>>> I am seeing ``APIC error on CPU3: 60(60)'' warnings from dmesg
>>>> periodically on a CentOS 5.4 box, kernel 2.6.18-164.11.1.el5.
>>>> The CPU is an Intel(R) Atom(TM) CPU 330 @ 1.60GHz.  I am not a
>>>> hardware type, and don't have a clue what this means.
>>> Try "noapic" on the kernel boot parameter.  Also if that don't work out
>>> try "acpi=off"
>> Hi,
>>
>> just jumpin' in: I too have an Atom-based machine which runs *rock
>> solid* with ''noapic'' as parameter, and crashes without.
>>
>> However, I've got another machine based on exactly the same hardware
>> (board, CPU, memory, HD, everything) and the same BIOS config -- running
>> flawlessly without the parameter given.
> 
> We have four boxes in small chassis (micro-atx?) with Atom
> processors that are having no problems.  These machines are
> basically gateway boxes for small businesses and do OpenVPN
> tunnels inter-connecting three offices in Texas and one in
> Missouri.
> 
> The box in question is in a larger chassis that doesn't require a 
> low-profile NIC.  It's several months newer than the others so I
> don't know if they're the same main board.
> 
>>>> This is occurring while an rsync-3.0.4 process is receiving data
>>>> sent by a machine running rsync-3.0.7 (I just updated the CentOS
>>>> box to rsync-3.0.7 since noticing that it was a bit dated).  This
>>>> is the only significant load on this machine at this time.
>>> Maybe your running out of kernel threads and or APIC can't distribute
>>> interrupts across the CPU.  Or APIC don't like your motherboard/cpu
>>> under stress.
>> My impression was that it was not load (I tortured both machines running
>> BOINC for a few weeks) but traffic. Thus, I suspect the (on board) NIC
>> to be a bit... crappy (IIRC it was Realtek)? I've always wanted to test
>> it with a reasonable NIC.
> 
> This shouldn't be on the on-board RealTek NIC, but on the Intel
> that's in a regular slot.  On the other hand, when I look at the
> dmesg output it appears that it's the RealTek on the public NIC.
> 
> FWIW, after I updated this to rsync-3.0.7 yesterday afternoon, I
> restarted the rsync using -vP to monitor it, and it has been
> transferring without a glitch for 15 hours now.

However, I'm really convinced that an application/daemon (rsync in this
case) should NOT be able to crash the entire system.

Timo

> Bill

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Re: [CentOS] cpuspeed CentOS 5.4

[Timo Schoeler]

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thus MOKRANI Rachid spake:
> Hi,
>  
> cpuspeed did not start on all my systems. CentOS 5.4 x86_64
>  
> /etc/init.d/cpuspeed start (nothing happen) 
>  
> Something is missing ?
>  
> Thanks in advance for any idea.
>  
> Regards

Hi,

are there any enlightening messages in

/var/log/messages

or in the output of

dmesg

?

Timo

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Re: [CentOS] APIC error on Intel Atom CPU, CentOS 5.x

[Timo Schoeler]

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thus ken spake:
> On 03/16/2010 07:17 AM Timo Schoeler wrote:
>> thus JohnS spake:
>>> On Tue, 2010-03-16 at 09:53 +0100, Timo Schoeler wrote:
>>>> For me it dies on any kind of traffic, not just rsync. I even saw this
>>>> fetching ISOs using FTP. The machine just died (network-wise; I don't
>>>> have console on this machine in the data centre, but I do have a machine
>>>> of this type here in the office, so I could build a test setup with KVM).
>>>>
>>>> On the machine that runs stable for weeks now
>>>>
>>>> # uptime
>>>> 09:51:33 up 47 days, 47 min,  1 user,  load average: 0.14, 0.11, 0.09
>>> What brand of NIC Card do you have and is the BIOS version different or
>>> the same?  I'm just wondering since you guys are having problems,
>>> because I have been considering on buying an Atom based machine.
>> I can't tell you the exact BIOS version I've running, but I presume
>> they're the same on both hosts (the one freaking out and the other
>> running rock solid); the NIC is
>>
>> 01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
>> RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)
>>
>> Board is Intel D945GLF2, CPU is Intel Atom CPU 3...@1.60ghz stepping 02
>>
>> ...
>>
>> Timo
> 
> Timo, Just to be clear, the specs cited above are for the machine that
> works or the one with the problem?

Both. I've got two totally identical machines running with the specs
mentioned above, one of them runs rock solid w/o the ``noapic'' tweak as
kernel boot argument, the other one crashes without. With ``noapic''
enabled, it also runs rock solid. OS on both is CentOS 5.4 x86_64 with
all updates applied.

> tnx

Timo
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Re: [CentOS] APIC error on Intel Atom CPU, CentOS 5.x

[Timo Schoeler]

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thus JohnS spake:
> On Tue, 2010-03-16 at 09:53 +0100, Timo Schoeler wrote:
> 
>> For me it dies on any kind of traffic, not just rsync. I even saw this
>> fetching ISOs using FTP. The machine just died (network-wise; I don't
>> have console on this machine in the data centre, but I do have a machine
>> of this type here in the office, so I could build a test setup with KVM).
>>
>> On the machine that runs stable for weeks now
>>
>> # uptime
>> 09:51:33 up 47 days, 47 min,  1 user,  load average: 0.14, 0.11, 0.09
> 
> What brand of NIC Card do you have and is the BIOS version different or
> the same?  I'm just wondering since you guys are having problems,
> because I have been considering on buying an Atom based machine.

I can't tell you the exact BIOS version I've running, but I presume
they're the same on both hosts (the one freaking out and the other
running rock solid); the NIC is

01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)

Board is Intel D945GLF2, CPU is Intel Atom CPU 3...@1.60ghz stepping 02

> John

HTH,

Timo

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Re: [CentOS] APIC error on Intel Atom CPU, CentOS 5.x

[Timo Schoeler]

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thus Martin Jungowski spake:
> If it helps I'm experiencing a *very* similar problem with all Atom N270 
> based company netbooks (Lenovo S10e) with openSUSE 11.2 and Kernel 2.6.31, 
> as well as openSUSE 11.1 and Kernel 2.6.27. Putting load on the NIC works 
> fine until I start rsync. Literally everything else allows me to put load 
> on it - ftp, scp, downloading large files via HTTP, copying via NFS or 
> SMB, etc. But as soon as I start rsync it locks up. 

For me it dies on any kind of traffic, not just rsync. I even saw this
fetching ISOs using FTP. The machine just died (network-wise; I don't
have console on this machine in the data centre, but I do have a machine
of this type here in the office, so I could build a test setup with KVM).

On the machine that runs stable for weeks now

# uptime
09:51:33 up 47 days, 47 min,  1 user,  load average: 0.14, 0.11, 0.09

I've got TOR running, which uses a sustained bandwidth of about three
MBit (which is not that much, it had about ten MBit for quite a while
with an additional FreeNet daemon running).

> It doesn't even start 
> to transfer anything - the NIC instantly dies and more often than not 
> takes the entire system down with it. Every now and then instead of a full 
> lockup I only get a dead NIC. Killing the rsync process hard (-9) and 
> restarting the network often helps.
> 
> I realize that this is a very different software environment but I was 
> about to try CentOS on that baby next. I'll try the noapic option when I 
> get back to my office but it's interesting how so different environments 
> seem to produce similar errors. I guess what I'm trying to say is that 
> it's probably not a CentOS-specific issue we're dealing with here.
> 
> Martin

Timo

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Re: [CentOS] APIC error on Intel Atom CPU, CentOS 5.x

[Timo Schoeler]

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thus JohnS spake:
> On Mon, 2010-03-15 at 19:13 -0700, Bill Campbell wrote:
>> I am seeing ``APIC error on CPU3: 60(60)'' warnings from dmesg
>> periodically on a CentOS 5.4 box, kernel 2.6.18-164.11.1.el5.
>> The CPU is an Intel(R) Atom(TM) CPU 330 @ 1.60GHz.  I am not a
>> hardware type, and don't have a clue what this means.
> 
> Try "noapic" on the kernel boot parameter.  Also if that don't work out
> try "acpi=off"

Hi,

just jumpin' in: I too have an Atom-based machine which runs *rock
solid* with ''noapic'' as parameter, and crashes without.

However, I've got another machine based on exactly the same hardware
(board, CPU, memory, HD, everything) and the same BIOS config -- running
flawlessly without the parameter given.

>> This is occurring while an rsync-3.0.4 process is receiving data
>> sent by a machine running rsync-3.0.7 (I just updated the CentOS
>> box to rsync-3.0.7 since noticing that it was a bit dated).  This
>> is the only significant load on this machine at this time.
> 
> Maybe your running out of kernel threads and or APIC can't distribute
> interrupts across the CPU.  Or APIC don't like your motherboard/cpu
> under stress.

My impression was that it was not load (I tortured both machines running
BOINC for a few weeks) but traffic. Thus, I suspect the (on board) NIC
to be a bit... crappy (IIRC it was Realtek)? I've always wanted to test
it with a reasonable NIC.

>> This machine has locked up requiring a hard reset twice while
>> this rsync process has been running at night with no problems at
>> other times.
> 
>  Most of the times I have seen hard lockups is with interrupt problems
> of distribution of them and failing hardware.
> 
> John

Timo

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Re: [CentOS] how to monitor,or be notified of email blacklisting ?

[Timo Schoeler]

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thus Rudi Ahlers spake:
> Hi,
> 
> Does anyone know how I can monitor our server's for blacklisting? We
> run a large amount of shared hosting & reseller hosting servers and
> from time to time one of the IP's will get blacklisted. I'm looking
> for a way to be notified if any of our IP's get blacklisted. Is this
> possible?

Hi,

do you run nagios? I have a script running here to get notified in case
we're blacklisted.

The German ``iX Magazin'' (focused on Unix) had some nice stuff, too:

http://www.heise.de/netze/artikel/Verdrehte-Abfrage-223890.html

The article itself is in german, the scripts are not. You can run the
one mentioned (URL above) as a cron job and receive an email in case
you're blacklisted somewhere.

Maybe this is a good start.

HTH,

Timo


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Re: [CentOS] About addition of hardware and kernel

[Timo Schoeler]

--- Original message ---
> From: Jose Luis Marin Perez 
> Sent: 10.3.'10,  21:07
>
> Dear Sirs
>
> I have a ML370 G4 server with 1 CPU Intel (R) Xeon (TM) 3.60GHz and 2GB 
> of RAM with operating system CentOS 4.7 and kernel 2.6.9-78.0.22.ELsmp
>
> We have acquired 1 CPU and 2 GB of RAM additional to improve the 
> functioning of the server, my question is whether the current kernel can 
> support the addition of hardware or if I need a new kernel or install any 
> additional software.
>
> Thanks
>
> Jose Luis

Should work flawlessl after installing the additional CPU and memory; maybe 
you want to check the server vendor's support pages for BIOS upgrades, 
there may be newer versions. As you have to take the machine out of service 
anyways, this is a good time to check this, too.

(OTOH: Never touch an running system, so if it finds all the memory and CPU 
installed additionally and there's nothing noted in the BIOS changelog, you 
can ignore it.)

HTH,

Timo 
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Re: [CentOS] Tripwire on Centos

[Timo Schoeler]

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thus Kai Schaetzl spake:
> Bob Aiello wrote on Sun, 07 Mar 2010 10:25:53 -0500:
> 
>> I am using 2.6.18-028stab059.6
> 
> This is not a CentOS version.

No, this is an out-dated OpenVZ kernel, based on CentOS. :)

Timo

> Kai

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Re: [CentOS] Recover RAID

[Timo Schoeler]

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thus Jeff Sadino spake:
> Thanks Timo, that one actually made me laugh!

I really hope that this wasn't irony from your side. Well, if there's
nothing left, there's still gallows humor...

Timo

> On Wed, Mar 3, 2010 at 9:15 PM, Timo Schoeler
> wrote:
> 
> thus Sorin Srbu spake:
>>>> From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On
> Behalf
>>>> Of Jeff Sadino
>>>> Sent: Thursday, March 04, 2010 6:15 AM
>>>> To: CentOS mailing list
>>>> Subject: Re: [CentOS] Recover RAID
>>>>
>>>> Backups?  I wish :)  I will now.
>>>> But looking closer, that md1 is not my OS partition, just a data
> partition.
>>>> If I take that md1 entry out of the raidtab file and restart the
> computer, I
>>>> would think that it would start up just fine, minus the data partition
> (and
>>>> for the moment neglecting any vital programs that might be installed on
> that
>>>> partition).  My question is when I start the computer back up, in order
> to
>>>> start up without that partition there any more, will the OS write any new
>>>> files or anything that will not be reversible?
>>>> 
>>>>
>>>> Eh? Raid0 with no backups? For real?
> Backups are for sissies; running a hara-kiri RAID demands *not* having
> backups. Or did the kamikaze pilots have parachutes?
> 
> SCNR
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Re: [CentOS] Recover RAID

[Timo Schoeler]

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thus Sorin Srbu spake:
> From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf
> Of Jeff Sadino
> Sent: Thursday, March 04, 2010 6:15 AM
> To: CentOS mailing list
> Subject: Re: [CentOS] Recover RAID
> 
> Backups?  I wish :)  I will now.
> But looking closer, that md1 is not my OS partition, just a data partition. 
> If I take that md1 entry out of the raidtab file and restart the computer, I
> would think that it would start up just fine, minus the data partition (and
> for the moment neglecting any vital programs that might be installed on that
> partition).  My question is when I start the computer back up, in order to
> start up without that partition there any more, will the OS write any new
> files or anything that will not be reversible?
> 
> 
> Eh? Raid0 with no backups? For real?

Backups are for sissies; running a hara-kiri RAID demands *not* having
backups. Or did the kamikaze pilots have parachutes?

SCNR
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Re: [CentOS] [CentOS-virt] Very unresponsive, sometimes stalling domU (5.4, x86_64)

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

thus Pasi Kärkkäinen spake:
> On Tue, Mar 02, 2010 at 09:30:50AM +0100, Timo Schoeler wrote:
>> -BEGIN PGP SIGNED MESSAGE-
>> Hash: SHA1
>>
>> Hi list,
>>
>> please forgive cross posting, but I cannot specify the problem enough to
>> say whether list it fits perfectly, so I'll ask on both.
>>
>> I have some machines based with following specs (see at the end of the
>> email).
>>
>> They run CentOS 5.4 x86_64 with the latest patches applied, Xen-enabled
>> and should host one or more domUs. I put the domUs' storage on LVM, as I
>> learnt ages ago (what never caused any problems) and is way faster than
>> using file-based 'images'.
>>
>> However, there's something special about these machines: They have the
>> new WD EARS series drives, which use 4K sector sizes. So, I booted a
>> rescue system and used fdisk to start at sector 64 instead of 63 (long
>> story made short: Due to overhead causing the drive to do much more,
>> inefficient writes when starting at sector 63, the performance
>> collapses; with 'normal' geometry (sector 63), the drive achieves about
>> 25MiByte/sec writes, with starting at sector 64 partition, it achieves
>> almost 100MiByte/sec writes):
>>
>> [r...@server2 ~]# fdisk -ul /dev/sda
>>
>> Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
>> 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
>> Units = sectors of 1 * 512 = 512 bytes
>>
>>Device Boot  Start End  Blocks   Id  System
>> /dev/sda1   *  64 2097223 1048580   fd  Linux raid
>> autodetect
>> Partition 1 does not end on cylinder boundary.
>> /dev/sda2 209722418876487 8389632   82  Linux swap / Solaris
>> /dev/sda318876488  1953525167   967324340   fd  Linux raid
>> autodetect
>>
>> On top of those (two per machine) WD EARS HDs there's ``md'' providing
>> two RAID1, /boot and LVM, as well as swap per HD (i.e. non-RAIDed). LVM
>> provides the / partition as well as LVs for Xen domUs.
>>
>> I have about 60 machines running that style and never had any problems.
>> They run like a charm. On these machines, however, domUs are *very*
>> slow, have a steady (!) load of about two -- 50% stating in 'wait' --
>> and all operations take ages, e.g. a ``yum update'' with the recently
>> released updates.
>>
>> Now, can that be due to 4K issues I didn't see, nestet now in LVM?
>>
>> Help is very appreciated.
>>
> 
> Maybe the default LVM alignment is wrong for these drives.. 
> did you check/verify that? 
> 
> See:
> http://thunk.org/tytso/blog/2009/02/20/aligning-filesystems-to-an-ssds-erase-block-size/
> 
> Especially the "--metadatasize" option.

Hi Pasi, hey lists,

thanks for the hint. Following is the 'most important' part of the text:

``So I created a 1 gigabyte /boot partition as /dev/sdb1, and allocated
the rest of the SSD for use by LVM as /dev/sdb2. And that’s where I ran
into my next problem. LVM likes to allocate 192k for its header
information, and 192k is not a multiple of 128k. So if you are creating
file systems as logical volumes, and you want those volume to be
properly aligned you have to tell LVM that it should reserve slightly
more space for its meta-data, so that the physical extents that it
allocates for its logical volumes are properly aligned. Unfortunately,
the way this is done is slightly baroque:

# pvcreate –metadatasize 250k /dev/sdb2
Physical volume “/dev/sdb2″ successfully created

Why 250k and not 256k? I can’t tell you — sometimes the LVM tools aren’t
terribly intuitive. However, you can test to make sure that physical
extents start at the proper offset by using:

# pvs /dev/sdb2 -o+pe_start
PV VG   Fmt  Attr PSize  PFree  1st PE
/dev/sdb2   lvm2 –   73.52G 73.52G 256.00K

If you use a metadata size of 256k, the first PE will be at 320k instead
of 256k. There really ought to be an –pe-align option to pvcreate, which
would be far more user-friendly, but, we have to work with the tools
that we have. Maybe in the next version of the LVM support tools….''

So, after taking care of starting at sector 64 *and* taking care
``pvcreate'' has its 'multiple of 128k', I still have the same problem.

Most interestingly, debian 'lenny' does *not* have this problem. LVM's
PV does *not* have to be like mentioned above.

So, unfortunately, it seems like I'm forced to use debian in this
project, at least on a few machines. *shiver*

> -- Pasi

Timo
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[CentOS] Very unresponsive, sometimes stalling domU (5.4, x86_64)

[Timo Schoeler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Hi list,

please forgive cross posting, but I cannot specify the problem enough to
say whether list it fits perfectly, so I'll ask on both.

I have some machines based with following specs (see at the end of the
email).

They run CentOS 5.4 x86_64 with the latest patches applied, Xen-enabled
and should host one or more domUs. I put the domUs' storage on LVM, as I
learnt ages ago (what never caused any problems) and is way faster than
using file-based 'images'.

However, there's something special about these machines: They have the
new WD EARS series drives, which use 4K sector sizes. So, I booted a
rescue system and used fdisk to start at sector 64 instead of 63 (long
story made short: Due to overhead causing the drive to do much more,
inefficient writes when starting at sector 63, the performance
collapses; with 'normal' geometry (sector 63), the drive achieves about
25MiByte/sec writes, with starting at sector 64 partition, it achieves
almost 100MiByte/sec writes):

[r...@server2 ~]# fdisk -ul /dev/sda

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes

   Device Boot  Start End  Blocks   Id  System
/dev/sda1   *  64 2097223 1048580   fd  Linux raid
autodetect
Partition 1 does not end on cylinder boundary.
/dev/sda2 209722418876487 8389632   82  Linux swap / Solaris
/dev/sda318876488  1953525167   967324340   fd  Linux raid
autodetect

On top of those (two per machine) WD EARS HDs there's ``md'' providing
two RAID1, /boot and LVM, as well as swap per HD (i.e. non-RAIDed). LVM
provides the / partition as well as LVs for Xen domUs.

I have about 60 machines running that style and never had any problems.
They run like a charm. On these machines, however, domUs are *very*
slow, have a steady (!) load of about two -- 50% stating in 'wait' --
and all operations take ages, e.g. a ``yum update'' with the recently
released updates.

Now, can that be due to 4K issues I didn't see, nestet now in LVM?

Help is very appreciated.

Cheers,

Timo

- ---

Linux server2.blah.org 2.6.18-164.11.1.el5xen #1 SMP Wed Jan 20 08:06:04
EST 2010 x86_64 x86_64 x86_64 GNU/Linux

- ---

[r...@server2 ~]# cat /proc/cpuinfo
processor   : 0
vendor_id   : GenuineIntel
cpu family  : 6
model   : 23
model name  : Intel(R) Core(TM)2 Quad CPUQ9400  @ 2.66GHz
stepping: 10
cpu MHz : 1998.000
cache size  : 3072 KB
physical id : 0
siblings: 1
core id : 0
cpu cores   : 1
fpu : yes
fpu_exception   : yes
cpuid level : 13
wp  : yes
flags   : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36
clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc
pni monitor ds_cpl vmx smx est tm2 cx16 xtpr lahf_lm
bogomips: 6668.58
clflush size: 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor   : 1
vendor_id   : GenuineIntel
cpu family  : 6
model   : 23
model name  : Intel(R) Core(TM)2 Quad CPUQ9400  @ 2.66GHz
stepping: 10
cpu MHz : 1998.000
cache size  : 3072 KB
physical id : 1
siblings: 1
core id : 0
cpu cores   : 1
fpu : yes
fpu_exception   : yes
cpuid level : 13
wp  : yes
flags   : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36
clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc
pni monitor ds_cpl vmx smx est tm2 cx16 xtpr lahf_lm
bogomips: 6668.58
clflush size: 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor   : 2
vendor_id   : GenuineIntel
cpu family  : 6
model   : 23
model name  : Intel(R) Core(TM)2 Quad CPUQ9400  @ 2.66GHz
stepping: 10
cpu MHz : 1998.000
cache size  : 3072 KB
physical id : 2
siblings: 1
core id : 0
cpu cores   : 1
fpu : yes
fpu_exception   : yes
cpuid level : 13
wp  : yes
flags   : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36
clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc
pni monitor ds_cpl vmx smx est tm2 cx16 xtpr lahf_lm
bogomips: 6668.58
clflush size: 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor   : 3
vendor_id   : GenuineIntel
cpu family  : 6
model   : 23
model name  : Intel(R) Core(TM)2 Quad CPUQ9400  @ 2.66GHz
stepping: 10
cpu MHz : 1998.000
cache size  : 3072 KB
physical id : 3
siblings: 1
core id : 0
cpu cores   : 1
fpu : yes
fpu_exception   : yes
cpuid level : 13
wp  : yes
flags   : fpu tsc msr pae mce cx8 apic mtrr mca cmo

Re: [CentOS] unattended fsck on reboot

[Timo Schoeler]

--- Original message ---
> From:  
> To: centos@centos.org
> Sent: 18.2.'10,  18:55
>
> Timo wrote:
>> --- Original message ---
>>> From:  
>>> Sent: 18.2.'10,  18:21
 On Thu, Feb 18, 2010 at 10:12 AM, Henry Ritzlmayr
 wrote:
> nate wrote:
  >
> >I don't bother changing the setting for local disks as it is
> >usually pretty quick to scan them. You must have a pretty big
> > and/or slow file system for fsck to take 2+ hours.
> >
> > This particular server has 2x 500GB HDD's with failry "full" XEN
> > VM's on it, each with it's own LVM volumes, so I guess it's a bit
> > more complex than a normal ext2 system :)
>>>
>>> Um, we've only got some cluster nodes with drives under 750G; most of
>>> ours have that, or 950G, and we're moving a lot to 1T, and some 1.5T.
>>> Then there's large raid arrays. They take a *while* to fsck. Unless I'm
>>> having serious disk problems, I've had to boot using fastboot as a
>>> kernel line parm for grub.
>>
>> What about using a 'decent' file system, such as XFS?
>
> Lessee, I'm *not* talking about my system at home.

Hm, I'm talking about both: My file server (about 10TiByte RAID) and...

> a) I'm talking about
> work;

..my systems at work.

> b) My manager, my co-worker, and myself support nearly 200 servers,
> including 5 clusters.

Roughly the same numbers here - and that's the CentOS boxen only, not to 
mention xBSD, Solaris, and AIX machines.

IMHO one of the main reasons for running (Open)Solaris for most people 
(read: those w/o having to run Solaris due to historical reasons) do so 
because of ZFS.

XFS has different feature sets, strenghts and weaknesses, but the advantage 
of both XFS and ZFS is their total lack of fsck hassles, compared to extN.

> Some people that we support "only" run jobs that go
> for 2-4 days, but there was the guy who was running a job that I had to
> wait until it was finished to reboot the NFS server with his home
> directory... and I waited ->two weeks<-.

So, where's exactly the connection to underlying file systems?
 
> Then there's the question of how we'd migrate.
>
> Sorry, time for a real world check.

One of my most favorite jokes is to begin IT related discussions with 'in 
an ideal world'... ;)
 
>  mark "that is, if my manager was willing in the
>   first place"

Timo

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Re: [CentOS] unattended fsck on reboot

[Timo Schoeler]

--- Original message ---
> From:  
> Sent: 18.2.'10,  18:21
>
>> On Thu, Feb 18, 2010 at 10:12 AM, Henry Ritzlmayr
>> wrote:
>>> nate wrote:
>>  >
>>> > I don't bother changing the setting for local disks as it is
>>> > usually pretty quick to scan them. You must have a pretty big
>>> > and/or slow file system for fsck to take 2+ hours.
>>> >
>>> > This particular server has 2x 500GB HDD's with failry "full" XEN VM's
>>> > on it, each with it's own LVM volumes, so I guess it's a bit more
>>> > complex than a normal ext2 system :)
>
> Um, we've only got some cluster nodes with drives under 750G; most of 
> ours
> have that, or 950G, and we're moving a lot to 1T, and some 1.5T. Then
> there's large raid arrays. They take a *while* to fsck. Unless I'm having
> serious disk problems, I've had to boot using fastboot as a kernel line
> parm for grub.

What about using a 'decent' file system, such as XFS?
 
>   mark

Timo 
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