SUSE Real Time Linux on S390X?

2008-07-22 Thread Bruce Furber
I read that SUSE Real Time Linux is available for Intel and AMD. Will it be 
offered for System Z?

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Re: SUSE Real Time Linux on S390X?

2008-07-22 Thread Mark Post
 On Tue, Jul 22, 2008 at 10:28 AM, in message
[EMAIL PROTECTED]
, Bruce Furber [EMAIL PROTECTED] wrote: 
 I read that SUSE Real Time Linux is available for Intel and AMD. Will it be 
 offered for System Z?

My understanding is that it will not, at least for now.  It doesn't even 
compile for me.  Even if it was available, it would only make sense (to me), in 
an LPAR with dedicated processors.  Not exactly an ideal situation.


Mark Post

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Lost putty SSH Session - is there a way to associate the new session back the user/activity of the lost session?

2008-07-22 Thread Sienicki, Paul K
If an Putty SSH Session is lost for what ever reason. 

Is there a way to associate/connect the new Putty SSH session back to
the user/activity ongoing of the lost session?

Thank you

Paul

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Re: SUSE Real Time Linux on S390X?

2008-07-22 Thread Evans, Kevin R
Interesting, but what type of work load are you anticipating needing
this for on a Z?

Kevin

-Original Message-
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
Bruce Furber
Sent: Tuesday, July 22, 2008 10:29 AM
To: LINUX-390@VM.MARIST.EDU
Subject: SUSE Real Time Linux on S390X?

I read that SUSE Real Time Linux is available for Intel and AMD. Will it
be offered for System Z?

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Cloning of SLES10 image and logon IDs

2008-07-22 Thread Whiteman, Mark
Is there an easy way to utilize a cloning system where I can copy the
Linux user accounts and passwords?  My system needs are quite small ,
maybe 5 user Id's whose sole purpose is to administer (shutdown/reboot)
and start/stop WebSphere.  The server image I deploy runs just the
minimum services to support WebSphere  (no NFS, SAMBA, Mail, LDAP, etc).
I want to hopefully achieve a maintenance scheme whereby I can just
change-out the Linux IPL volume with a new updated/patched version and
not have to make individual YAST updates to each server.  WebSphere
already permits this shared binary approach to its software, I'm kind
of looking for the same thing here. 


Mark W.

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Re: Lost putty SSH Session - is there a way to associate the new session back the user/activity of the lost session?

2008-07-22 Thread McKown, John
 -Original Message-
 From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On 
 Behalf Of Sienicki, Paul K
 Sent: Tuesday, July 22, 2008 9:48 AM
 To: LINUX-390@VM.MARIST.EDU
 Subject: Lost putty SSH Session - is there a way to associate 
 the new session back the user/activity of the lost session?
 
 If an Putty SSH Session is lost for what ever reason. 
 
 Is there a way to associate/connect the new Putty SSH session back to
 the user/activity ongoing of the lost session?
 
 Thank you
 
 Paul

I doubt it. When the session dies, then the shell will likely die with a
SIGHUP. What I do in this situation is use the screen command. You
make the SSH connection, which gets you a shell. You then run screen.
This gives you another shell. The screen command itself runs nohup and
so if your SSH session dies, your screen session's shell continues on.
You then reconnect using SSH, getting another shell session of course.
You then do a screen -r to reconnect to the screen session that was
running. Of course, this means that you must consistently use screen
when you first connect to the system. screen also allows for multiple
shell sessions. But you can only view one session at a time. But you can
switch between them. Somewhat like 3270 session managers such as CA-TPX
or Tubes, if you are familiar with them.

The above does you little good if you are doing X work because the X
session will die when the SSH connection dies.

--
John McKown
Senior Systems Programmer
HealthMarkets
Keeping the Promise of Affordable Coverage
Administrative Services Group
Information Technology

The information contained in this e-mail message may be privileged
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Re: Cloning of SLES10 image and logon IDs

2008-07-22 Thread David Boyes
Use Kerberos or NIS, or run either Winbind or PAM to get the user info
from a remote source. Since you need to coordinate userids and UIDs
across images anyway, that scales better, and you only have to update in
one place.

For a small number of ids, NIS is probably simpler to set up, but
Kerberos will scale better (and allow you to play nice with AD if you
need to). 

 Is there an easy way to utilize a cloning system where I can copy the
 Linux user accounts and passwords

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Re: SUSE Real Time Linux on S390X?

2008-07-22 Thread Bruce Furber
It is to run a Rules Engine as a service to other application servers.

Someone was asking about it saying it was available with Redhat and wanted to 
know about SUSE.
They wanted to make sure they did not have to switch distros.
I think they are mistaken though the RedHat MRG Realtime is only available on 
x86 and x86-64

-- Original message -- 
From: Evans, Kevin R [EMAIL PROTECTED] 

 Interesting, but what type of work load are you anticipating needing 
 this for on a Z? 
 
 Kevin 
 
 -Original Message- 
 From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of 
 Bruce Furber 
 Sent: Tuesday, July 22, 2008 10:29 AM 
 To: LINUX-390@VM.MARIST.EDU 
 Subject: SUSE Real Time Linux on S390X? 
 
 I read that SUSE Real Time Linux is available for Intel and AMD. Will it 
 be offered for System Z? 
 
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Re: SUSE Real Time Linux on S390X?

2008-07-22 Thread Evans, Kevin R
So, are you after consistent times, high-resolution timers or
something else?

Kevin

-Original Message-
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
Bruce Furber
Sent: Tuesday, July 22, 2008 11:22 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: SUSE Real Time Linux on S390X?

It is to run a Rules Engine as a service to other application servers.

Someone was asking about it saying it was available with Redhat and
wanted to know about SUSE.
They wanted to make sure they did not have to switch distros.
I think they are mistaken though the RedHat MRG Realtime is only
available on x86 and x86-64

-- Original message --
From: Evans, Kevin R [EMAIL PROTECTED]

 Interesting, but what type of work load are you anticipating needing
 this for on a Z?

 Kevin

 -Original Message-
 From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
 Bruce Furber
 Sent: Tuesday, July 22, 2008 10:29 AM
 To: LINUX-390@VM.MARIST.EDU
 Subject: SUSE Real Time Linux on S390X?

 I read that SUSE Real Time Linux is available for Intel and AMD. Will
it
 be offered for System Z?

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Re: Cloning of SLES10 image and logon IDs

2008-07-22 Thread Whiteman, Mark
I guess my point is, if I deploy from a gold  image, I'll probably
want to change passwords on the various clones.  If I put patches/fixes
onto my gold image and want to redeploy it, I'll go back to the
original passwords.  So, when I redploy, could I simply take a backup of
the /etc/passwd, group, shadow and copy them back over the original
members that existed on the gold image ?



Mark W.

.   

The only place Linux stores local user information is in /etc/passwd,
/etc/shadow, and /etc/group.  Without special schemes to get around it,
/etc lives in your root file system.  So, any method you come up with to
copy one system to another will automatically bring with it the same
userids and passwords.


Mark Post

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Re: SUSE Real Time Linux on S390X?

2008-07-22 Thread Bruce Furber
Yes
It is to run a Rules Engine as a service to other application servers.

Someone was asking about it saying it was available with Redhat and wanted to 
know about SUSE.
They wanted to make sure they did not have to switch distros.
I think they are mistaken though the RedHat MRG Realtime is only available on 
x86 and x86-64


-- Original message -- 
From: Evans, Kevin R [EMAIL PROTECTED] 

 So, are you after consistent times, high-resolution timers or 
 something else? 
 
 Kevin 
 
 -Original Message- 
 From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of 
 Bruce Furber 
 Sent: Tuesday, July 22, 2008 11:22 AM 
 To: LINUX-390@VM.MARIST.EDU 
 Subject: Re: SUSE Real Time Linux on S390X? 
 
 It is to run a Rules Engine as a service to other application servers. 
 
 Someone was asking about it saying it was available with Redhat and 
 wanted to know about SUSE. 
 They wanted to make sure they did not have to switch distros. 
 I think they are mistaken though the RedHat MRG Realtime is only 
 available on x86 and x86-64 
 
 -- Original message -- 
 From: Evans, Kevin R 
 
  Interesting, but what type of work load are you anticipating needing 
  this for on a Z? 
  
  Kevin 
  
  -Original Message- 
  From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of 
  Bruce Furber 
  Sent: Tuesday, July 22, 2008 10:29 AM 
  To: LINUX-390@VM.MARIST.EDU 
  Subject: SUSE Real Time Linux on S390X? 
  
  I read that SUSE Real Time Linux is available for Intel and AMD. Will 
 it 
  be offered for System Z? 
  
  -- 
 
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  send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 
 or 
  visit 
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  -- 
 
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Re: Cloning of SLES10 image and logon IDs

2008-07-22 Thread Mark Post
 On Tue, Jul 22, 2008 at 11:35 AM, in message
[EMAIL PROTECTED],
Whiteman, Mark [EMAIL PROTECTED] wrote: 
 I guess my point is, if I deploy from a gold  image, I'll probably
 want to change passwords on the various clones.  If I put patches/fixes
 onto my gold image and want to redeploy it, I'll go back to the
 original passwords.  So, when I redploy, could I simply take a backup of
 the /etc/passwd, group, shadow and copy them back over the original
 members that existed on the gold image ?

Yes.  Or, you could use public-private key pairs and not even worry about 
passwords.


Mark Post

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Re: Cloning of SLES10 image and logon IDs

2008-07-22 Thread RPN01
I would guess that, for a system to be useful, /etc/passwd and shadow would
change over time to include other userids for whatever task or application
is taking place there. That would preclude copying and old copy over the
current one producing any useful results.

The approach we've used is to connect pam on each image to an LDAP server
which maintains the accounts. Each server has an associated netgroup, and
users of that server have that netgroup included in their LDAP profiles,
allowing them to log into the server.

Doing maintenance by writing over the /, /usr, or /boot directories is a
Very Bad Idea . Even if you only do /boot, there are kernel changes which
necessitate changes to the programs that interface to the kernel function.
Maintenance is an all-inclusive thing, where changes are made in /etc,
/boot, /usr/bin, /usr/share and many other locations, all at once. These
things, most times, need to be in sync in order for the system to run
correctly. 

I've not seen a way to correctly propagate all the necessary pieces of a
maintenance run, other than using YaST itself. Down other paths lie
insanity. There are system management and provisioning products that claim
to be able to do it... Look at them closely and make them prove that they
work before you commit your systems to them.

-- 
Robert P. Nix  Mayo Foundation.~.
RO-OE-5-55 200 First Street SW/V\
507-284-0844   Rochester, MN 55905   /( )\
-^^-^^
In theory, theory and practice are the same, but
 in practice, theory and practice are different.




On 7/22/08 10:35 AM, Whiteman, Mark [EMAIL PROTECTED] wrote:

 I guess my point is, if I deploy from a gold  image, I'll probably
 want to change passwords on the various clones.  If I put patches/fixes
 onto my gold image and want to redeploy it, I'll go back to the
 original passwords.  So, when I redploy, could I simply take a backup of
 the /etc/passwd, group, shadow and copy them back over the original
 members that existed on the gold image ?
 
 
 
 Mark W.
 
 . 
 
 The only place Linux stores local user information is in /etc/passwd,
 /etc/shadow, and /etc/group.  Without special schemes to get around it,
 /etc lives in your root file system.  So, any method you come up with to
 copy one system to another will automatically bring with it the same
 userids and passwords.
 
 
 Mark Post
 
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Re: Lost putty SSH Session - is there a way to associate the new session back the user/activity of the lost session?

2008-07-22 Thread Adam Thornton

On Jul 22, 2008, at 9:48 AM, Sienicki, Paul K wrote:


If an Putty SSH Session is lost for what ever reason.

Is there a way to associate/connect the new Putty SSH session back to
the user/activity ongoing of the lost session?

Thank you


The basic answer is only if you were running under screen.

But if you don't know screen.

You should.  Anything long that would be a pain if it hung up, run
under screen.

http://www.gnu.org/software/screen/

Adam

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Re: Lost putty SSH Session - is there a way to associate the new session back the user/activity of the lost session?

2008-07-22 Thread Mark Post
 On Tue, Jul 22, 2008 at 11:55 AM, in message
[EMAIL PROTECTED], Adam Thornton
[EMAIL PROTECTED] wrote: 
-snip-
 http://www.gnu.org/software/screen/

Or, in Paul's particular case, /suse/s390x/screen-4.0.2-62.14.s390x.rpm

I use screen a lot when doing long-running package builds for Slack/390.  It's 
a wonderful tool.


Mark Post

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Re: Lost putty SSH Session - is there a way to associate the new session back the user/activity of the lost session?

2008-07-22 Thread Edmund R. MacKenty
On Tuesday 22 July 2008 12:01, Mark Post wrote:
Or, in Paul's particular case, /suse/s390x/screen-4.0.2-62.14.s390x.rpm

I use screen a lot when doing long-running package builds for Slack/390.
 It's a wonderful tool.

Screen is fantastic!  It was the core of my standard working environment back
in the 80's, when I had a VT102 with a serial line to a UNIX box.  I'd keep
about 10 screens active for weeks or months, with shells in most and Emacs in
a couple of others.  I could connect to the same screens remotely too, so I'd
have all that context available no matter where I was.  Now I keep my context
in about 20 xterms spread over 12 desktops on my laptop.  Same idea, but
screens kept my context on the server, where it was safer.
- MacK.
-
Edmund R. MacKenty
Software Architect
Rocket Software, Inc.
Newton, MA USA

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Re: Cloning of SLES10 image and logon IDs

2008-07-22 Thread Adam Thornton

On Jul 22, 2008, at 10:35 AM, Whiteman, Mark wrote:


I guess my point is, if I deploy from a gold  image, I'll probably
want to change passwords on the various clones.  If I put patches/
fixes
onto my gold image and want to redeploy it, I'll go back to the
original passwords.  So, when I redploy, could I simply take a
backup of
the /etc/passwd, group, shadow and copy them back over the original
members that existed on the gold image ?


Yes.

Although, as David points out, for scalability, it really is better to
keep this stuff centralized somewhere.  LDAP+krb5 (plus Microsoft
schema extensions, alas) is pretty much the way to do this these
days.  Not that AD is the *best* answer necessarily, but it's an OK
answer, and it's pretty ubiquitous.

Adam

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Re: z/Linux cloning

2008-07-22 Thread Stricklin, Raymond J
Our cloning process sounds similar to yours. I have an EXEC which takes
care of poking VM:Secure correctly, FLASHCOPYing the necessary MDISKs,
and then updating our internal recordkeeping.

One command, about two seconds, then another thirty or so to IPL
(assuming DNS is updated ahead of time). It's fairly well customized to
our site requirements, but the basic building blocks could be  easily
adapted to other sites. I also suspect now that SLES10 SP2 includes
support for the VMUR driver, even though I haven't yet looked closely at
the options, we'll be able to get even more fancy with our automation.

I can also share details with any interested parties.

Some of the drawbacks of doing it from Linux (instead of from CMS) are
that FLASHCOPY needs privilege class B, and you're more likely to
aggravate LVM. 

ok
r.

-Original Message-
From: RPN01 [mailto:[EMAIL PROTECTED] 
Sent: Friday, July 18, 2008 10:09 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: z/Linux cloning

We have a cloning process that is down to a single zVM command to create
a new image, and we can create new images in about 8 minutes time from
zVM command to being able to log into the new image. The master images
occupy disk space, but are not running at any time. Since the disk
copies are done from zVM via Flashcopy, the cloning process is
independent of filesystem choice and works with LVM managed disks. As
far as I know, we're the only ones using the process at the moment. If
there's an interest, I can share it with you.

--
Robert P. Nix  Mayo Foundation.~.
RO-OE-5-55 200 First Street SW/V\
507-284-0844   Rochester, MN 55905   /( )\
-^^-^^
In theory, theory and practice are the same, but  in practice, theory
and practice are different.




On 7/18/08 10:36 AM, Quay, Jonathan (IHG) [EMAIL PROTECTED]
wrote:

 What's the current best practices cloning solution for z/Linux under

 z/VM?  We've used the one found in Running z/VM to Host Linux - 
 Installation and Customization class documentation (the CLONER and 
 CLONEDDR virtual machines).  Is there one that's newer, better or 
 better supported?  We have multiple CECs, z/Linux lpars, and both Suse

 and Redhat, if that makes a difference.  We don't anticipate creating 
 hundreds of clones, maybe 20 or so in the first wave.




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Re: z/Linux cloning

2008-07-22 Thread Alan Altmark
On Tuesday, 07/22/2008 at 06:46 EDT, Stricklin, Raymond J
[EMAIL PROTECTED] wrote:
 Some of the drawbacks of doing it from Linux (instead of from CMS) are
 that FLASHCOPY needs privilege class B, and you're more likely to
 aggravate LVM.

You can move class B FLASHCOPY to any privclass you want.

Alan Altmark
z/VM Development
IBM Endicott

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Re: #autoinst - parmfile - SLES install will not consider CTC as valid even though connected.

2008-07-22 Thread Sienicki, Paul K
 Mark,

I mis stated yast in the earlier email. It is the SLES IPL 00C
installation with full specifications including autoinst, that gives up
on finding the source before the CTC connects. The console shows the
CTC0 connecting after the install program has shifted to a manual
install. After this no matter how I attempt to select CTC and give it
response the install program will not proceed but reverts right back to
the network device question even though the CTC selected even though it
is already connected. It is like it thinks it is bad selection and will
not reconsider it.
 
I have tried several things to reset or get it to accept/proceed with
the CTC response information. Some are: tapping off the answers and
taking the defaults that are being presented, giving bogus address
responses, selecting other connection methods different not connected
responses. Re-IPLing 00C clear, etc. 

The only way I have been successful to get the CTC to be accepted is to
replace the parmfile SUSE with the simple 1 line parmfile (knocking out
the autoinst along with the other stuff). Even then I have throw away
the SLES ipl of 00C and reipl 00C. Followed by giving bad addresses for
the ctc and failing and then on the 2nd iteration giving the right
information. Some how the defaults are remembered through a logoff/logon
different parmfile SLES invocation.

I will paste the 2 parmfiles and a given console of the network device
selection prompt loop.

Autoinst attempted parmfile:

ramdisk_size=65536 root=/dev/ram1 ro init=/linuxrc TERM=dumb  
instnetdev=ctc pointopoint=199.42.190.45 hostip=199.42.190.3  
Gateway=199.42.190.45 Nameserver=127.0.0.1 Netmask=255.255.255.255
dhcp=2
readchannel=0.0.0e00  
writechannel=0.0.0e01 
ctcprotocol=0 
install=ftp://199.42.190.8/   
autoyast=http://199.42.190.48/suse/autoinst.xml   
usessh=1 sshpassword=temp

Simple parmfile:

ramdisk_size=65536 root=/dev/ram1 ro init=/linuxrc TERM=dumb 

Console of SLES install giving up and looping through prompts on the CTC
network device prompts:

sles
003 FILES PURGED
RDR FILE 0006 SENT FROM CLIENT   PUN WAS 0006 RECS 076K CPY  001 A
NOHOLD NOKEEP
RDR FILE 0007 SENT FROM CLIENT   PUN WAS 0007 RECS 0010 CPY  001 A
NOHOLD NOKEEP
RDR FILE 0008 SENT FROM CLIENT   PUN WAS 0008 RECS 104K CPY  001 A
NOHOLD NOKEEP
003 FILES CHANGED
003 FILES CHANGED
Linux version 2.6.16.46-0.12-default ([EMAIL PROTECTED]) (gcc version
4.1.2 20070115 (prerelease) (SUSE Linux)) #1 SMP Thu May 17 14:0
0:09 UTC 2007
We are running under VM (64 bit mode)
Detected 1 CPU's
Boot cpu address  0
Built 1 zonelists
Kernel command line: ramdisk_size=65536 root=/dev/ram1 ro init=/linuxrc
TERM=dumbinstnetdev=ctc pointopoint=199.
42.190.45 hostip=199.42.190.3Gateway=199.42.190.45
Nameserver=127.0.0.1 Netmask=255.255.255.255  dhc
p=2
PID hash table entries: 4096 (order: 12, 131072 bytes)

Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
Memory: 496640k/524288k available (4494k kernel code, 0k reserved, 1221k
data, 204k init)
Security Framework v1.0.0 initialized
Mount-cache hash table entries: 256
checking if image is initramfs... it is
Freeing initrd memory: 8128k freed
cpu 0 phys_idx=0 vers=FF ident=04912A machine=2066 unused=
Brought up 1 CPUs
migration_cost=1000
NET: Registered protocol family 16
debug: Initialization complete
cio: Channel measurements not available, continuing.
audit: initializing netlink socket (disabled)
audit(1216779850.524:1): initialized
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
Initializing Cryptographic API
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered (default)
io scheduler cfq registered
RAMDISK driver initialized: 16 RAM disks of 65536K size 1024 blocksize
md: md driver 0.90.3 MAX_MD_DEVS=256, MD_SB_DISKS=27
md: bitmap version 4.39
Channel measurement facility using basic format (autodetected)
NET: Registered protocol family 2
IP route cache hash table entries: 32768 (order: 6, 262144 bytes)
TCP established hash table entries: 131072 (order: 9, 2097152 bytes)
TCP bind hash table entries: 65536 (order: 8, 1048576 bytes)
TCP: Hash tables configured (established 131072 bind 65536)
TCP reno registered
NET: Registered protocol family 1
Freeing unused kernel memory: 204k freed
Moving into tmpfs... done.

 SUSE Linux Enterprise Server 10 installation program v2.0.67 (c)
1996-2007 SUSE Linux Products GmbH 

Starting udev ...
... udev running
SCSI subsystem initialized
NET: Registered protocol family 17
loop: loaded (max 8 devices)
Starting hardware detection...