Re: To kick or to clone ... that is the question

[WILLIAM CARROLL]

Hi Scott,

I'll jump on your bandwagon but then again you already know I perfer
Kickstarting over cloning
you should also mention that unless you have Flashcopy for your DASD
Kickstarting is actually faster than cloning.
unless your clone master is very small.

as you recall ours was on a mod3 (lots of required garbage)  and cloning
that mod3 was slower than kickstarting
also after the kickstart was done the server was ready,  no additional steps
to change IP's or anything.

if only redhat would fix that re-ipl after the reboot.
they say it's an IBM issue not thiers

Doug Carroll


- Original Message -
From: "Scott Rohling" 
To: 
Sent: Wednesday, June 10, 2009 12:00 AM
Subject: To kick or to clone ... that is the question



This is a blatant request for discussion about the pros and cons of using
an
automated installation (e.g. RH kickstart - Suse autoyast (though maybe
this
has changed - I'm not current on Suse) - vs cloning a system from a
'golden
image'...   and I should say:   on zSeries.

I'm a fan of kickstart - and I'll list my reasons in approximate order of
importantance to me (most to least):

- kickstart forces a scripted and recreatable installation.   You specify
the rpm's and can do some limited scripting within the kickstart file
itself
to end up with (hopefully) a working Linux system that requires no manual
tweaking (at least - if you do it 'right').  The alternative is a cloned
system that the Linux SA's have been on, and perhaps several other teams -
all performing manual tasks to end up with the final product - all sorts
of
shoeprints and no good detectives.  Whereas a kickstart config is
self-documenting - a clone is not.   With good scripting and good use of
rpm
packaging for your 'local' or even 'vendor' products - you can end up with
a
very KISS config file that might even go multiplatform.  (e.g. arch=`uname
-m` )

- with a proper building of conf and parm files on z/VM - a guest can be
kicked already configured with a working network -- no need for some
outside
scripting or manual config.

- you can have different kickstart files for different server 'types'
(web,
app, db, etc) - these can even be built dynamically and requested via a
URL
to to the kickstart ( e.g.
http://mykicker/kick.web&ip=xx.xx.xx.xx+etc+etc.)

- The size of the DASD can be flexible..   cloning requires copying the
same
size DASD as the source..

-  The latest fixes can be applied by keeping the repository the kickstart
uses current - rather than updating a clone source.  (of course - testing
is
still required and would require kickstarting a guest to truly do any
testing - a good thing imo)

-  It encourages packing by rpm rather than manual 'tarball' methods..
this
is in line with a 'recreatable' install.   Yes, you can still do 'tar'
commands in the kickstart file itself..  but specifying an rpm package is
oh
so much easier.

-  Servers start 'clean' - ie no old log files from the clone source and
no
need to try and script a 'cleanup'

-  No worrying about whether a clone source is 'up' when a new server is
clone and possibly clone a live system


There are downsides..  but I'll leave those to the rest of you to expound
on, since I'm taking a position of 'kickstart good, Jane'

Thanks and hope this is valuable to some ..

Scott

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Re: Samba authorization

[William Carroll]

I don't' think setting umask in /etc/profile would do anything.
that's only run at shell login time and samba does not do a shell login
for the user
putting the umask in init.options where it is a global parm might do it
and keeping the umask in /etc/profile what you really want to login user
would help fix that problem
but not sure it will fix the samba issue at hand

what does the samba logs show when a user creates a file?
the answer might be in there
you may have to enable logging and/or turn up the logging level to see.


William D Carroll



From:
"van Sleeuwen, Berry" 
To:
LINUX-390@VM.MARIST.EDU
Date:
05/05/2011 09:20 AM
Subject:
Re: Samba authorization
Sent by:
Linux on 390 Port 



The s-bit indeed now let samba force to the group zlinux. But regardless
of umask 022 or 002 in the /etc/profile we still have 744 on the files in
the PL_LINUX directory. Even with create_mask  and force create mode
770.

-rwxr--r-- 1 nl12237 zlinux0 May  5 14:45 New (20) Text Document.txt

So how to get from "-rwxr--r--" to " -rwxrw-r--"? (or -rwxrwxr--)

And the downside of umask 002, now my files outside samba are created 664.
Group users now would have write permission on all my files so I had to
set umask back to 002.

Regards, Berry.


> -Original Message-
> From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of
> Michael MacIsaac
> Sent: woensdag 4 mei 2011 16:20
> To: LINUX-390@VM.MARIST.EDU
> Subject: Re: Samba authorization
>
> Did you try setting the g+ws bit on the directory and set umask to 002?
> Here's an example:
>
> # cd /
> # mkdir samba
> # chmod g+ws samba
> # chgrp users samba
> # vi /etc/profile
> ... // set umask to 002
> # grep umask /etc/profile
> # The global umask value is stored in /etc/login.defs and # will be set
by
> pam_umask.so (see "man pam_umask").
> umask 002
> # su mikemac
> mikemac:> cd /samba
> mikemac:> touch foo
> mikemac:> mkdir bar
> mikemac:> ls -l
> total 4
> drwxrwsr-x 2 mikemac users 4096 2011-05-04 10:12 bar
> -rw-rw-r-- 1 mikemac users0 2011-05-04 10:11 foo
> mikemac:> cd bar
> mikemac> touch foo
> gpok191:/samba/bar # ls -l foo
> ls -l foo
> -rw-rw-r-- 1 mikemac users 0 2011-05-04 10:13 foo
>
> This "pushes down" R/W authority below /samba for the group named
> users.
> It's outside the scope of Samba, but may work fine, and then you
wouldn't
> have to worry so much about the smb.conf settings.
>
> "Mike MacIsaac"(845) 433-7061
>
>
> ...
> >
> > We have tried several of the recommendations but still the files are
> created
> > as  group users and only the owner has read/write on the
files.
> Is
> > there anything else we can do?...
>
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Re: SLES 11 SP1 install can't find disks?

[William Carroll]

Scott

Doesn't this remind you of the issue we had with RHEL5 and it not 
recognizing the dasd during a kickstart?
basically if we CMS formatted it worked but a dasdfmt didn't and we got a 
"do you wish to format this volume" or similar message.
it was because RH changed the scripts method of checking the dasd for that 
issue as I recall.
RH i think was trying to make the script more common between platforms.

Not saying Suee is doing the same thing but sounds like a similar issue?

Just sounds like a similar issue.

William D Carroll
Mainframe Engineering, Build
Office:  614-677-3885
Email: carrol...@nationwide.com



From:
Scott Rohling 
To:
LINUX-390@VM.MARIST.EDU
Date:
05/17/2011 08:36 AM
Subject:
Re: SLES 11 SP1 install can't find disks?
Sent by:
Linux on 390 Port 



Hi Mike - I do recall running into this.. but it's been a few months. Have
you retried the install now that the disks are formatted?  IIRC, I was 
able
to get through the install on my 2nd attempt.   It could be that I ended 
up
formatting the disks with CMS and then retrying - my memory is hazy.  I
suspected a bug but was in a hurry at the time and just trying to get
through an install..

Scott Rohling

On Tue, May 17, 2011 at 6:19 AM, Michael MacIsaac 
wrote:

> Rogerio,
>
> > did you attach dasd to the guest ?
> They are minidisks.  There was no error message when logging onto the
> virtual machine.  Thanks.
>
> "Mike MacIsaac"(845) 433-7061
>
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Re: SLES 11 SP1 install can't find disks?

[William Carroll]

Yes,
As i recall our solution in the end was to zero the first cylinder of 
device/minidisk and that cured it.
I think we did that in the kickstart with a dd if=/dev/zero of=/dev/dasda 
bs=1024 count=32
count and bs may be wrong but you get the idea

Since it's only the head of the disk that contains the info that confuses 
the script  this was a simple method


William D Carroll
Mainframe Engineering, Build
Office:  614-677-3885
Email: carrol...@nationwide.com



From:
Scott Rohling 
To:
LINUX-390@VM.MARIST.EDU
Date:
05/17/2011 09:25 AM
Subject:
Re: SLES 11 SP1 install can't find disks?
Sent by:
Linux on 390 Port 



Hi Doug -   Yes, it does seem similar if CMS formatting was really the 
cure
-- unfortunately, my memory isn't real reliable in this case.   It could 
be
that the experience we had with RHEL5 makes me try this as possibility now
too  ;-)

What I'm trying to do by CMS formatting the disk is eliminating any 
possible
Linux formatting that is already there..  I have found things like 
leftover
LVM info (from another guest) can confuse things.   Linux formatting the
disk also works (e.g. using Sine Nomine's LXFMT instead of FORMAT) and
avoids needing to format during the install.

Most of the issues I've run into with both RH/Suse are with disks that
weren't 'cleaned' and came from a previous guest.  One nice solution I've
implemented in the past is to have the DIRMAINT 'clean' exit issue LXFMT
instead of FORMAT so that all DASD returned is already Linux formatted.. 
but
it's usefulness depends on whether you use the same size minidisks for all
guests.  (I tend to use 1-END disks and not chop up volumes).

Scott Rohling

On Tue, May 17, 2011 at 7:07 AM, William Carroll 
wrote:

> Scott
>
> Doesn't this remind you of the issue we had with RHEL5 and it not
> recognizing the dasd during a kickstart?
> basically if we CMS formatted it worked but a dasdfmt didn't and we got 
a
> "do you wish to format this volume" or similar message.
> it was because RH changed the scripts method of checking the dasd for 
that
> issue as I recall.
> RH i think was trying to make the script more common between platforms.
>
> Not saying Suee is doing the same thing but sounds like a similar issue?
>
> Just sounds like a similar issue.
>
> William D Carroll
> Mainframe Engineering, Build
> Office:  614-677-3885
> Email: carrol...@nationwide.com
>
>
>
> From:
> Scott Rohling 
> To:
> LINUX-390@VM.MARIST.EDU
> Date:
> 05/17/2011 08:36 AM
> Subject:
> Re: SLES 11 SP1 install can't find disks?
> Sent by:
> Linux on 390 Port 
>
>
>
> Hi Mike - I do recall running into this.. but it's been a few months. 
Have
> you retried the install now that the disks are formatted?  IIRC, I was
> able
> to get through the install on my 2nd attempt.   It could be that I ended
> up
> formatting the disks with CMS and then retrying - my memory is hazy.  I
> suspected a bug but was in a hurry at the time and just trying to get
> through an install..
>
> Scott Rohling
>
> On Tue, May 17, 2011 at 6:19 AM, Michael MacIsaac
> wrote:
>
> > Rogerio,
> >
> > > did you attach dasd to the guest ?
> > They are minidisks.  There was no error message when logging onto the
> > virtual machine.  Thanks.
> >
> > "Mike MacIsaac"(845) 433-7061
> >
> > --
> > For LINUX-390 subscribe / signoff / archive access instructions,
> > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 
or
> > visit
> > http://www.marist.edu/htbin/wlvindex?LINUX-390
> > --
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> > http://wiki.linuxvm.org/
> >
>
> --
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>
>
>
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Re: ASCII to EBCDIC conversion

[William Carroll]

The IBM OpenSSH server does not support  ascii/bin keywords,   everything
is in binary mode.
It was designed around x86 to x86 as I understand it and going binary only
you can send text or binary ok
but now that mainframe is doing this also and its not just x86 you have
issue's.

You can use Dovetail to help this or Tectia I believe

without those two  your options are

dd
tr
iconv

sftp also does not support SITE

one option you could try,  I haven't done this myself thought
create a ssh tunnel for ftp  then once the tunnel is connected use normal
ftp over ssh
your still secure but have the same old ftp client to deal with

William D Carroll
Mainframe Engineering, Build
Office:  (614) 677-3885
Cell: (614) 266-5402
Email: carrol...@nationwide.com



From:
Michael Stephens 
To:
LINUX-390@VM.MARIST.EDU
Date:
06/14/2011 10:08 AM
Subject:
Re: ASCII to EBCDIC conversion
Sent by:
Linux on 390 Port 



Parthasarathy ,

I am inferring that you need to FTP to or from a z/OS system.  z/VM or VSE
are much the same.  My experience with FTP to and from z/OS is that EBCDIC
to ASCII is automatic.  You must set BINARY on to prevent the conversion.
That may be a local option, however.  I've not used it, but presumably
SFTP works the same.

The main issue you might have is that ordinary z/OS files have logical
record lengths, LRECL, and not line feeds as the record terminators. Linux
source records longer than the z/OS destination LRECL will be truncated.
Shorter records will be either blank or null filled.  I don't know if the
line feed character will be translated.  You could define a z/OS variable
blocked record, but make sure the Linux source records are no longer than
the block size, BLKSIZE.  Going from z/OS to Linux or Windows is generally
not such a problem.

Also, watch out for numeric field conversions.  Some of the many z/OS
numeric formats may not convert the way you wish.  It is generally better
to create the source files with numbers in display format, without commas,
and programmatically convert them.

I hope this helps,
Michael Stephens


-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of
Scott Rohling
Sent: Tuesday, June 14, 2011 8:49 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: ASCII to EBCDIC conversion

I'm not sure this will make a difference -- I misread the table .. and the
LF characters are the same in ebcdic or ibm..
You may need to use 'tr' or some other translate function after the dd.

Scott Rohling

On Tue, Jun 14, 2011 at 7:43 AM, Scott Rohling
wrote:

> Did you use 'ebcdic' or 'ibm' for conversion type on the dd command?
> Whichever you used, you might want to try and use the other and see if
> results change.
>
> Scott Rohling
>
>
> On Mon, Jun 13, 2011 at 11:15 PM, Sundaram, Parthasarthy <
> parthasarthy.sunda...@eds.com> wrote:
>
>> Hi  Team,
>>
>>  Very good morning...Iam parthasarathy working in Mphasis.Kindly
>> requesting you to help me on my below queries.
>>
>> i)  In SunOS how to convert the ASCII mode to EBCDIC mode in SFTP
>> mode.
>> ii) Iam able to convert the ASCII file to EBCDIC thru DD command
>> outside SFTP mode.Is this the right command.
>> iii)I have a file with 100 records but after converting from ASCII
>> to EBCDIC all the 100 records is aligned in the single line.Please
>> let me know how to resolve this and iam sure that carriage return is
>> missing. Please let me know how to apply the carriage return value
>> during the EBCDIC conversion.
>>
>> It could be highly appreciated if you help me on this.
>>
>> Parthasarathy Sundaram
>> Mphasis an HP company
>> Level 4, 1-B DLF Info City, 1/124 Shivaji Garden , Manapakkam,
>> Chennai-89
>> Mob: 91 9176663227
>> parthasarthy.sunda...@hp.com
>> parthasarthy.sunda...@eds.com
>>
>>
>>
>>
>> -
>> - For LINUX-390 subscribe / signoff / archive access instructions,
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>> http://wiki.linuxvm.org/
>>
>
>

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The information contained in

Re: Poor man's top

[William Carroll]

The cut says to cut from character 1 to end of line which is why it looks
the same
with watch it would start to cause to line wrap issue's and this forces
each line to end correctly

this may have been an issue when running from a console instead of a
telnet or ssh session,  not sure about that one

William D Carroll
Mainframe Engineering, Build
Office:  (614) 677-3885
Cell: (614) 266-5402
Email: carrol...@nationwide.com



From:
Scott Rohling 
To:
LINUX-390@VM.MARIST.EDU
Date:
07/21/2011 01:24 PM
Subject:
Re: Poor man's top
Sent by:
Linux on 390 Port 



Just ensure 80 amount of characters are displayed on each line ..   you
can
certainly leave it out --  it's been too long for me to remember why that
was stuck in  :(I'm not sure now what the rationale was..

Scott Rohling

On Thu, Jul 21, 2011 at 11:04 AM, Bauer, Bobby (NIH/CIT) [E] <
baue...@mail.nih.gov> wrote:

> Can somebody explain to me what the 'cut' step is suppose to do? I left
it
> out and the results appear to be the same.
>
> Bobby Bauer
> Center for Information Technology
> National Institutes of Health
> Bethesda, MD 20892-5628
> 301-594-7474
>
>
>
> -Original Message-
> From: Richard J Moore [mailto:richardj_mo...@uk.ibm.com]
> Sent: Thursday, July 21, 2011 12:57 PM
> To: LINUX-390@VM.MARIST.EDU
> Subject: Re: Poor man's top
>
> very good. nice suggestion.  but I needed to do:
>
> watch -n 10 -d 'ps aux --sort -%cpu | cut -c1- | head -20'
>
> Richard
>
>
>
>
> From:   Scott Rohling 
> To: LINUX-390@vm.marist.edu
> Date:   21/07/2011 17:43
> Subject:Poor man's top
> Sent by:Linux on 390 Port 
>
>
>
> I found this buried in some notes..   thought others might enjoy it.
Much
> less overhead then top.. :
>
> watch -n 10 -d 'ps aux --sort -%cpu | cut -c1-0 | head -20'
>
> Scott Rohling
>
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Re: bogomips

[William Carroll]

Isn't a BOGOMIP just a calculated loop value (ie how many times through
the loop) used to do some internal timing.
at best it give a course indicator that one processor is faster but I
would say relative to the same architecture as one may favor the loop
better than others.
so not all BOGOMIPs are not equal.

Doug



From:
Mark Post 
To:
LINUX-390@VM.MARIST.EDU
Date:
02/21/2012 04:37 AM
Subject:
Re: bogomips
Sent by:
Linux on 390 Port 



>>> On 2/20/2012 at 11:30 PM, Thang Pham  wrote:
> How do you convert the bogmips value found under /proc/cpuinfo into MHz?
> There is not much useful information online on how to do this on s390x.

You don't.  There's no useful information on how to do that on _any_
architecture, since "bogo" == "bogus."  Tell us what type of machine
you're running on, and we can tell you what processor speed you have.
Which also won't mean much unless you're running in an LPAR with dedicated
processors.


Mark Post

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Re: FTP problem

[William Carroll]

That's controlled via pam, just remove the kerberos pam config to remove
that.
however that's not the problem.
best guess is you have SElinux enabled and it is blocking you
if you do not intend to use SELinux you can set it to permissive mode or
disable completely
if you do want SELinux used, you need to set the Boolean to allow FTP access
check /var/log/messages   it should let you know what's going on there
I don't have the commands handy to turn it off or allow access

William Carroll

Kim Goldenberg wrote:

Stahr, Lea wrote:

We cannot get an FTP session open on this RHEL 5.1 system. Any ideas
what we are doing wrong??

[EMAIL PROTECTED] ~]# ftp  brksvl10

Connected to brksvl10.

220 (vsFTPd 2.0.5)

530 Please login with USER and PASS.

530 Please login with USER and PASS.

KERBEROS_V4 rejected as an authentication type


It looks like you haven't (correctly?) set up kerberos as an
authentication mechanism (pam?). As I don't use kerberos, I'm not
qualified to comment on how to set it up, but your user appear to be
attempting to connect with kerberos credentials.

Kim

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Re: Layer 2

[William Carroll]

Also just a note
You need to use at least RHEL4.6 to install layer2 rh. There's a bug
in pripy released that does not recognize layer2 in anaconda.  4.6
fixed this


William Carroll,
Sent from my iPhone 3G

On Dec 1, 2008, at 2:19 PM, Brad Hinson <[EMAIL PROTECTED]> wrote:


Here's a document on installing using layer2 on RHEL:

http://kbase.redhat.com/faq/docs/DOC-10539

For an installed guest, change /etc/sysconfig/network-scripts/ifcfg-
eth0:

remove the line: ARP=no
add the line: OPTIONS="layer2=1"

And as Marcy noted, if using VSWITCH, make sure it's defined with the
'ethernet' or 'eth' keyword in VM.

-Brad

Ayer, Paul W wrote:

Good morning all,

Does anyone have a link to some good doc on setting up layer 2
interfaces on zlinux? Some pointers would be great.

Thanks,
Paul

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Brad Hinson <[EMAIL PROTECTED]>
Sr. Support Engineer Lead, System z
Red Hat, Inc.
(919) 754-4198
www.redhat.com/z

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