I replied to Mike and Alan yesterday evening but it does not show in the
archives. I am assuming it got lost and I am resending. Sorry if this is a
duplicate.
If vmcp is called with a buffer of 1M and the last slab in
/proc/buddyinfo is 0, would it not be reasonable to nudge
the kernel to
Hi Tito,
the reason is, that this machine also serves as terminal server. In the
cookbook, it is also used to show the different setups of RHEL and SLES
for LNXADMIN, but the main reason is to run the IUCV terminal server.
Berthold
On Thu, 9 Jul 2015 22:00:19 -0300
Tito Garrido
Am 09.07.2015 um 19:16 schrieb Michael MacIsaac:
I'm going to stop here for now. I've learned a lot about Linux memory from
this thread (but that's easy when you don't know much to begin with :)).
I guess a question to the Linux developers in Germany would be:
If vmcp is called with a
That's a huge security hole, btw. Don't do that!
echo newroot:x:0:0:root:/root:/bin/bash | /usr/bin/tee /etc/passwd
a similiar command for /etc/shadow and you've gained root.
Am 09.07.2015 um 18:06 schrieb Michael MacIsaac:
Let me answer my own question. Perhaps kludgy, but by adding 'tee'
OK, y'all convinced me that always using a 1M buffer for vmcp is not the
best idea. I appreciate all the feedback.
Here's my first take at a bash function to retry a vmcp command with a few
boundary test cases:
# cat testvmcp
#!/bin/bash
function zVerbose
{
echo $@
}
The message sent to stderr is not documented in the device drivers book.
It tells you about the response code of 2, but the description of that
response code doesn't say anything about the error message to stderr or
that the message tells you how long the output was.
For use in scripts, it would
That's a huge security hole, btw. Don't do that!
this is an attempt to be more security minded, not less. Only admins would
have access to those sudo commands.
For example, if I am root and issue the command:
echo newroot:x:0:0:root:/root:/bin/bash /etc/passwd
then who added the newroot user?
Am 10.07.2015 um 13:19 schrieb Christian Borntraeger:
Anothing thing: 1M is quite large (the larges contiguous memory that Linux
wants
to allocate as slab). So try to not use that unless you need it. If you want
to
know how much memory is needed, then vmcp gives you back the result of the
Only admins would have access to those sudo commands.
But the sudoers line shows an intent to restrict access to tee only:
%zoom ALL=NOPASSWD:/usr/bin/tee
The hole that Karsten has shown is that the line in sudoers is really the
security equivalent of:
%zoom ALL=NOPASSWD:ALL
Whether it is a
Hello, all.
I would like to poll the group on this question:
Given a choice between Linux backup applications Bacula and Amanda
running in a Intel Linux environment, which would you select?
The environment is openSuSE 13.x on IBM/Lenovo Intel system running
headless...that is with no GUI
Dave,
In 2008, I looked at several options to backup the machines on my home
network. I settled on bacula, because at the time it had the most
options and was the easiest to configure(from my point of view). Since
that time, I've been backing up Linux clients and servers, Windows
servers and
Tito,
Why not 4 LNXADMIN USERS or 1 relocating if needed...
As Berthold mentioned, the Linux terminal server needs one Linux system per
z/VM. If you also use these servers as LDAP or DNS servers, you may want
one to be primary and others secondary/tertiary. A couple of other
solutions that fit
Hi people,
We always clone SLES penguins here, so they need to get an identity on
boot. We made this (rather kludgy) script:
--snip--
#!/bin/bash
# script name: configvm.sh
chccwdev -e 191 21 /dev/null
udevadm settle
DISC=/dev/disk/by-path/ccw-0.0.0191
sleep 1
# Get data from USER.CONFIG
I believe that a lot of customers have developed their own schemes for
dynamically configuring Linux guest IP addresses during boot, accommodating
different environments (such as production, DR, and test). Does anyone have
such a mechanism that they would be willing to share (scripts,
hmmm So If I have to install/clone linux 4 times, keep it synced... why not
4 LNXADMIN USERS or 1 relocating if needed?
The IUCV ANY statement doesn't allow me to relocate this server?
I am supposing that we are creating LNXADMIN as a IUCV server for the 4
members.
Regards,
Tito
On Fri, Jul
On Friday, 07/10/2015 at 10:26 EDT, Tito Garrido titogarr...@gmail.com
wrote:
hmmm So If I have to install/clone linux 4 times, keep it synced... why
not
4 LNXADMIN USERS or 1 relocating if needed?
The IUCV ANY statement doesn't allow me to relocate this server?
I am supposing that we are
On Friday, 07/10/2015 at 08:20 EDT, Bruce Hayden bjhay...@gmail.com
wrote:
The message sent to stderr is not documented in the device drivers book.
It tells you about the response code of 2, but the description of that
response code doesn't say anything about the error message to stderr or
Thank Berthold! One more question, it uses a subconfig with 2 minidisks for
each member. When we install it on member 1 does it propagate the
installation for the other minidisks? I didn't see any comment about the
subconfig minidisks regarding the data.
Regards,
Tito
On Fri, Jul 10, 2015 at
No - you will have to copy the disk yourself. These are meant to be
completely different disks - they won't be synced for you. The LNXADMIN
on each SSI member needs it's own R/W disks.
Scott Rohling
On Fri, Jul 10, 2015 at 6:33 AM, Tito Garrido titogarr...@gmail.com wrote:
Thank Berthold!
And they must have separate IP addresses, host names, etc. For a two member
SSI, I just install Linux twice. If you plan to have a 4-member SSI or
multiple SSI clusters, you may consider setting up a 'golden admin Linux'
system that can be cloned or built in some fashion.
-Mike M
On Fri, Jul
I was in the middle of something else and had to transfer a couple 3390 disk
images to another system. By the time I dumped them with DDR and VMARCed them,
they were just a little bit too large to transfer using FTP - the system has
only 3390 mod 3s, and the files were too big for one volume.
The same could be said of VM... Well, most of it
Lee Stewart ● VM System Support ● Visa ● Phone: 6(750)4601 - +1-303-389-4601 ●
lstew...@visa.com
-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Alan
Altmark
Sent: Friday, July 10, 2015
Dave,
Let me try the reply again...
In 2008, I looked at several options to backup the machines on my home
network. I settled on bacula, because at the time it had the most
options and was the easiest to configure(from my point of view). Since
that time, I've been backing up Linux clients and
On 7/10/2015 at 11:19 AM, Dave Jones d...@vsoft-software.com wrote:
Given a choice between Linux backup applications Bacula and Amanda
running in a Intel Linux environment, which would you select?
The environment is openSuSE 13.x on IBM/Lenovo Intel system running
headless...that is with
Thank you guys for clarifying!
On Fri, Jul 10, 2015 at 11:56 AM, Michael MacIsaac mike99...@gmail.com
wrote:
Tito,
Why not 4 LNXADMIN USERS or 1 relocating if needed...
As Berthold mentioned, the Linux terminal server needs one Linux system per
z/VM. If you also use these servers as
Same thing *has* been said of VM ... by an IBMer ... to me ... as he
deflected a legit inquiry/requirement.
On 07/10/2015 11:59 AM, Stewart, Lee wrote:
The same could be said of VM... Well, most of it
Lee Stewart ● VM System Support ● Visa ● Phone: 6(750)4601 - +1-303-389-4601
●
On Friday, 07/10/2015 at 03:03 EDT, Rick Troth r...@casita.net wrote:
Same thing *has* been said of VM ... by an IBMer ... to me ... as he
deflected a legit inquiry/requirement.
I certainly hope that's ancient history. If not, feel free to contact me
offline and maybe we can figure out what
That's a good point, Markand another point is that to build bacula
from source requires that the gcc-c++ compiler and libraries be available.
Have a good weekend, too.
DJ
On 07/10/2015 12:05 PM, Mark Post wrote:
On 7/10/2015 at 11:19 AM, Dave Jones d...@vsoft-software.com wrote:
Given a
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