op all email. That doesn't really solve the problem for someone who
wants to have their own domain. And regardless of whether there is
any spam or not, anyone can claim there was to get someone they don't
like on a blacklist.
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sentiment that ordinary people should be able to control their own
stuff, I don't think it is worth the battle.
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server without caring if any mail is actually
delivered seems somehow wrong.
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s just more stubborn
than most...
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ple's
> attention.
No, it is just annoying, and as you can see, the problem continues.
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k
> files to see if that would help; nada.
Did you try another 'yum update' after completing your old transaction?
Does 'startx' work from a text mode login? If not, maybe the error
message will give you a hint.
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ware is running.
If you hit escape when the splash screen starts, can you tell which
service startup is hanging?
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t, then 'rpm -q yum' to see if it shows 2
versions installed, then 'yum remove' the full package-version name of
the older one. And if yum still refuses, try 'rpm -e' with the older
package version.
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now offhand if fetchmail
pipes through sendmail for local delivery or uses smtp protocol, but
if it runs an executable named sendmail that is not actually sendmail,
it seems reasonable to call that emulation.Actually it seems
reasonable either way to me, but I suppose that's a matter of
opini
On Tue, Nov 26, 2013 at 5:58 PM, Michael Hennebry
wrote:
>>
> The $200 comes from googling D865GBFL price.
>
> $300 desktops? Where?
Search for 'refurbished desktop' on tigerdirect.com.
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_
hings.
> To the OP: is this a gaming machine, or just what you use? You mentioned
> $200 before install - I've seen refurbed entire desktops for $300.
I've had relatively good luck with stuff from tigerdirect.com but you
sort of take your chances.
om and too small a sample to draw conclusions Back
when computer hardware was expensive compared to human time it was fun
do debug stuff like that. Now, replacing it with something new would
probably save money in the long run just from power usage. Not to
mention working 10x faster.
-
eah, probably better to get something that is likely to run for 10
more years than to squeeze another year out of something old.
> On Mon, 25 Nov 2013, Les Mikesell wrote:
>>
>> I've seen a machine where it took 3+ days of running memtest86 to
>> catch the error. And
sk
image, is there some way to tie the interface names on the guest to
the same host bridge devices (or at least something known) so you'll
know which ifcfg-* file gets which address?
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bad RAM and even though it would
check clean, sometimes the read would come from the other mirror.
After fixing that, the server has run for years.
But in general, I always suspect power supplies first for mysterious crashes.
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On Wed, Aug 28, 2013 at 11:29 AM, Les Mikesell wrote:
>>
> This is a small lab-type setting but I'm trying to merge two sets of
> machines set up by different groups to have a common home directory
> server that all the others automount. The number of users is small
>
ad contradict and correct people with
> generic wisdom which are on-topic and have the specific knowledge
> and experience over many years
Fine, the next time I want to move MySQL 4.0-4.5 on Apple OSX *Power
PC* to MySQL 5.1/5.5 on Linux x86_64, I'll ask your advice.
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of the internals of every specific version of every specific program
that you might ever touch.
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that provide a tool for
portability and consistency.
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expect it to go
to the trouble of normalizing things like index files just in case you
wanted to move those disks to a sparc instead of doing a dump/load.
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a single time payling around with dumps
So no sparc's or the like in the picture? Not sure which way powerpc macs ran.
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tents will work
(along with the things already mentioned about /etc/my.cnf and
selinux).
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nt. If there aren't, using
the automounter would probably have worked. Are there versions where
umount -f actually works?
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of
general programming problems or the choices made by upstream
developers, although sometimes those are interesting and affect you as
a Centos user.
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tributes, nodes, paths and the like.
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hings than perl, you could use
groovy for fairly painless scripting with fairly complete xml handling
tools.
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ough to get
anything to work.
And if you aren't using it already, you probably want Jenkins to run
all these builds for you.
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write in the same location where
it will execute code. So, things like the vulnerabilities in the
struts framework that let you execute more or less arbitrary code
would let you add new sites or pages to a server that remain even
after a restart.
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te anything
else (like from the several instances of struts vulnerabilities)?
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series data that just change as additional samples
are added it might be worth working out a scheme to chunk it up so
only the 'current' time range changes and all of the historic
instances would stay identical.
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like logfile rotation can add up when
you catch it across a bunch of noisy hosts. You don't really need to
store the whole contents of yesterday's messages.1 and today's
messages.2 separately when they are the same thing, just renamed.
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eant whole backups to a less-full drive, or the much rarer times that we
> need to move a user who's using a *large* amount of space.
Backuppc will match up identical content, no matter where it finds it.
If it is a different copy or moved to a different location it does
have to transfe
ckup, backuppc's rsync will copy
it over the network because it doesn't have a match in that location,
but when it goes to add the compressed copy to the pool it will notice
that there is already a file with identical content there and use a
hardlink instead of needing additional spac
compress 2 to 10x. Just poking
through the 'compression summary' on my backuppc servers, I don't see
anything less than 55% and most of the bigger targets are closer to
80% compression. One that has 50Gb of logfiles, is around 90%.
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k directly with a
stock rsync and uncompressed files on the target hosts (and it can
cache the block-checksums so it doesn't have to uncompress and
recompute them every run). While it is 'just a perl script' it's not
quite what you expect from simple scripti
ers' for each
target host to (a) allow access through the web interface and (b) get
an email when backups have failed for a specified number of days.
Emails that only come when there is a problem are generally noticed,
unlike the ones that come every day and usually don't require any
action.
me-grown solutions
generally need someone who understands the code for support. If
that's you, I suppose that is job security...
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s of other stuff where backups would be nice to have and
backuppc makes it trivial to have, say, daily copies of all of /etc
from all machines going back months - or your own home directory.
And it doesn't blow up if you point it at a bunch of home directories
wher
hough there are some tradeoffs with extra
overhead for compression and the extra pool hardlink. In any case it
is trivial to install and test with the package in EPEL. Even if it
doesn't replace your server backup system you might find it useful to
point at some workstations or windows
On Tue, Nov 5, 2013 at 8:20 AM, Sorin Srbu wrote:
>> -Original Message-
>> From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On
>> Behalf Of Les Mikesell
>> Sent: den 5 november 2013 15:09
>> To: CentOS mailing list
>> Subject: Re:
se it makes an
extra hardlink into a pool directory tree where the name is a hash of
the content, but it takes care of all the other stuff for you and
would let you store a much longer history, especially if there are
duplicate copies of any of the files
On Tue, Nov 5, 2013 at 8:32 AM, wrote:
> Les Mikesell wrote:
>> On Tue, Nov 5, 2013 at 7:04 AM, Sorin Srbu
>> wrote:
>>>>
>>> Can e.g. BackupPC handle several file systems to backup to?
>>> I.e. comp1 through 10 should backup to /bak1, comp 11 thro
ba to dump VM images, iso images, database dumps,
clonezilla images, etc. in an ad-hoc fashion.
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aces and make the disk heads
seek all over the place. Might not be a big problem on SSD's though.
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> journalling transactions, so that they are in order, or something like
> that.
I just don't see where that kind of time can go unless it is forcing a
flush of a large (and probably mostly unrelated) cache to disk -
possibly even in the internal drive caches if there is a way to do
that, an
rest of our home directory servers
I'm trying to make sense of that timing. Does that mean that
pre-6.x, fsync() didn't really wait for the data to be written to
disk, or does it somehow take 7 minutes to get 100M onto your disk in
the right order? Or is th
er portions for ad-hoc copies
of things like that.
> Besides, if you have a problem with a truly humongous RAID, the rebuild
> will finish sometime around next summer
Yes, I'd probably use a RAID10 style RAID so it runs at full speed
even with a drive out of the array so you can put
things you want included. In any case, it will get
you a bootable iso with your installed kernel with just a few minutes
of work.
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. Otherwise you just re-use an
existing setup.
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Linux distributions inherit random variations from 30+ years of
different unix traditions plus whatever strangeness they each add to
distinguish themselves. Sometimes different is better, sometimes it
is just different.
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d/command option
so it runs the standard startup/shutdown script.
'command option'
is going to run the first instance of 'command' it finds in your
execution search $PATH, and then it is up to that command to interpret
the option. In other words there is no way to genera
t does with each argument (stop/start/restart are always handled,
other arguments may be).
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features, you may have to go to newer versions found
elsewhere, but be very careful about replacing any base packages in
your system - it is almost always the wrong thing to do. You need to
know more about Linux than the Red Hat engineers...
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>> Does 'startx' work at the console from runlevel 3?
>
> I'll try it.
It might make the machine usable to do that instead of a gdm login.
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On Wed, Oct 30, 2013 at 2:40 PM, Michael Hennebry
wrote:
> On Wed, 30 Oct 2013, Les Mikesell wrote:
>
>> On Wed, Oct 30, 2013 at 12:28 PM, Michael Hennebry
>> wrote:
>>>
>>> gdm hangs.
>> [...]
>>> user had insufficient privilege
>>
>&
x27;s odd, but maybe you have file system
corruption or some other cruft there. I don't think should cause a
hang, though.If you switch to a virtual console can you tell what
process is hung and see what strace says it is waiting for?
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le
> I started at the base urls given in .repo files and
> started looking for files that had the right names.
When you find the name, you've found the URL to get it... Most
browsers would have a right-mouse, 'copy link' menu option to put the
URL on the clipboard to paste elsew
On Tue, Oct 29, 2013 at 5:20 PM, Michael Hennebry
wrote:
> On Tue, 29 Oct 2013, Les Mikesell wrote:
>
>> Most repositories will have a 'name-release.rpm' where name is the
>> name of the repository. This will install the entry under
>> /etc/yum/repos.d and se
of
> effort out of a probably vain hope of discovery.
You might try running 'rpm -Va' to see if there are any surprises in
the list of differences between the current state and what was
installed.
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in the latter category set as 'enabled = 0' in the
repo file and use --enablerepo= on the yum command line when I want
something from them.
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writes ~ 57,9 MB/s (dd test)
> reads ~ 59,7 MB/s (uncached), 3,9 GB/s (cached) (dd test)
How do those compare to the native disk speed on your NFS server (if
it is a host where you can access the disks locally)? And does the
dd speed improve it you use
about here? NFS
shouldn't add that much overhead to reads compared to disk head
latency and if you enable client caching might be considerably
faster. If you are writing over NFS you don't get the same options,
though and sync mounts are going to be slow.
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since a yum
repository is maintained, installing isn't bad. It normally uses snmp
and remote probes of network protocols instead of a dedicated local
agent, but does have the ability to use some NRPE stuff from nagios if
you want.Don't think there is a usable 'read only'
+0x1d7/0x200
Oct 16 09:24:25 dev--l-01 kernel: [] ?
__audit_syscall_exit+0x265/0x290
Oct 16 09:24:25 dev-l-01 kernel: []
system_call_fastpath+0x16/0x1b
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blocked for more than 120 seconds.
Oct 15 09:08:32 dev-ngf-l-01 kernel: "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
messages on the console and /var/log/messages.
Is this a bug or there a way to avoid it?
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of my email into a single (sorted) pile.
But in the bigger picture, how much do you need those
accounts/addresses? And if you continue to use them at all, can you
set them to forward to something with more full-featured service?
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t'll be pretty cool once it's up and running, though.
I ran something similar using an SME server as the imap host for a
long time - before google offered imap service. But now that box is
dead and google is still running...
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, there is also
something called imapsync that can copy or move messages between
accounts. If your concern with gmail is only that you want your own
archive for reliability, you could let them do the processing work and
(probably) act as your norma
iptables blocking them. If the packets you send don't arrive
at all, something external is blocking them.
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recommend backuppc too. The de-dupe scheme lets
you keep a fairly long history on line without using a lot of disk
space. It can work directly with windows shares, but it is not that
much trouble to set up rsync.
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normally execute javascript internally, and there are
some toolkits like GWT to write interactive applications where you
write mostly server-side java and it generates the browser javascript
code for you.
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he media
> blown out of proportion ?
>
The security issues mostly related to running programs with the
browser plugings and they seem to be mostly fixed. As far as using it
as a server-side or standalone programming language goes it is as good
as anything else.
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st ok = yes. But then you won't
see the home share of some other user.
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e smb.conf file in the book I am using allows passwordless access to
> the shares.
Passwordless? I don't think so. Are you using 'connect as different
user' when you try to map the share? If you aren't authenticating as
the 'admin' user you won't even see th
nearby times. And
it includes tools to draw graphs out of the stored data. OpenNMS can
either use the standard native-code rrdtool library or a pure-java
reimplementation called jrobin.
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after a simple
yum install). Something like collectd would be more lightweight.
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hs.
>
It might be overkill for a single box, but tools like OpenNMS will
collect this info from any number of targets via snmp and let you
graph the history up to a year back.
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On Tue, Oct 1, 2013 at 10:23 AM, Tony Sweeney wrote:
> Surprisingly (to me, anyway), the SSH daemon is off by default in CentOS; you
> need to 'chkconfig sshd on' and 'service sshd start' as root in order to be
> able to ssh in.
>
That must depend on the type o
hurt to run multiple
times so you shouldn't have to be careful about that part..
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a jenkins job. But I think they are really
local windows with the remote control handled at some other level. I
don't have any trouble with remote windows tunneled by ssh connections
from my freenx session, though.
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nap to a new size as they start up, but the old mac version
would do a real resize (like linux) anytime.. I probably just missed
how to do it in the new version.
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h
On Tue, Sep 24, 2013 at 3:40 PM, wrote:
> Les Mikesell writes:
>> Is anyone using x2go on Centos - and if so, is there any reason to
>> think about switching from freenx? The old NX client for mac was a
>> powerpc binary and is no longer supported under mountain lion - a
thing better around. (And I didn't like the
way the new mac version changed the screen scaling instead of resizing
when you tried to change the window size, but maybe I just didn't
know how to do it).
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e is, and the backup account has no
> ability to change the parameters of the rsync account.
Is there something that convinces you that sudo is better at handling
the command restriction than sshd would be?
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way you
expect unless you have kerberos or some network authentication set up,
but if the uids are the same it should work and at least quit mapping
them to nobody.
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t as a search/replace script trying to make it so the
search targets will only match once (the old values) so it doesn't
matter if it runs again or not. And I'd probably copy the script in
and run it as part of the final shutdown steps.
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gt; 3050 su -l
> 3054 su -l
Someone else already pointed out the line numbers, but if you are
doing this interactively, you probably really want bash's internal
'search-history' operations (usually control-r for
reverse-search-history, but there are a bunch of options).
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> I mean, simpler than
>
> relayhost = yourispmta.domain.tld
>
> is hard to find, isn't it?
No, but it won't work with gmail... I don't think it would even work
with Comcast any more.
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things down to backing up at the file level instead of
full images (or maybe do it besides to keep a history) look at
backuppc. It will do the backups over rsync and pool all copies of
files with duplicate content whether they are on different machines or
previous backups of the same target. It wil
does NOT exist.
> And your mx record is mail.gayleard.eu, why don't you use that in your
> myhostname declaration?
This point isn't specific to postfix - it is just the current state of
affairs that most places arbitrarily reject email if the From: address
on an ext2/3/4 file system or xfs_admin -L /dev/sdc1 for XFS
> and then move to using file system labels instead. It will avoid the device
> enumeration problems discussed earlier.
Or make it worse, depending on how well and how centrally you can
track things like that.
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as the same copy originally
installed on the native hardware - and display performance won't be as
good, so I don't see a win there.
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l
the hardware details and VM guest list remotely and push to the
inventory sever (not really supported, but the version from the remi
repository seems to work). Then when you view a VM server it shows
its list of guests and when you view a guest it shows the host running
it - which also wo
gone up yet?
The linux components were just for the shell-level interaction and I
think they are mostly gone now. In any case, they don't have
security updates nearly as often as RHEL/Centos pushes a new kernel
which is an advantage for uptime on the guests.
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able. But, I haven't had any trouble getting KVM (or a
recent virtualbox) to run the same vmdk images, so you aren't
completely tied to it.
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perienced Windows
admin and uses a good anti-virus you may find you don't really hate
using it to host your VMware client and NX sessions.
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yum update"
from the base repos, do a "yum --enablerepo=xxx install package..."
(or update) for the specific packages you want from there.. This
isn't quite as full-auto as specifying the packages in the repo
file,but it will bring along dependencies that you mi
there were some way to avoid
having to manage yet another password for each user for samba,
although with central home directories that would only need to be on
one of the systems.
--
Les Mikesell
lesmikes...@gmail.com
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samba shares - and then anyone added locally
wouldn't work without the uid matching anyway. Is there a way to set
up an LDAP server with a few local users but that mostly does a proxy
to AD? And if I did, would users be able to map their home
directories as samba shares wi
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