[K12OSN] Core Files

James P. Kinney III jkinney at localnetsolutions.com
Tue Dec 11 16:37:16 UTC 2007

Add a hack to the user bash_profile to delete core files on login.

rm -f ~/core.*

On Tue, 2007-12-11 at 10:53 -0500, k12ltsp wrote:
> Hi everyone,
> We are having some big issues with Core files being created in the users
> home directories.
> We have set quotas on our network to 300 megs for each user account, and
> some users have issues where core files will take up the entire space in
> their account and prevent it from working.
> We have to continually delete core files in user accounts to get them
> working again. We suspect it is caused by crashes. Also, unfortunately
> students use the CTRL-ALT-BACKSPACE key as a preferred means of logging
> out (it's similar to a force-quit key sequence on a Mac that students were
> taught.), and I believe this is the main source of these files.
> We've looked online and haven't heard anything from any other LTSP users
> with the same issue. 
> I can confirm the issue isn't a hardware problem because we use 10
> different LTSP servers across the district with home mounted via NFS/NIS,
> and these files are created on users logged into any of these servers. It
> must be a configuration issue.
> Under our current setup, we use a Terabyte server as the central Home and
> authentication server, which runs ypserv and contains the home folder.
> Other servers connect via ypserv and mount the home. 
> The strange issue is, I know that under FC, and our FC6, that the creation
> of core files is turned off by default under the /etc/profile section:
> # No core files by default
> ulimit -S -c 0 > /dev/null 2>&1
> We went as far as turning on K12LTSP-LIMITS on, and added the following
> line under the k12ltsp-limits.sh file:
>         ulimit -S -c 0 > /dev/null 2>&1 
> Then restarted the server.
> user accounts:
> /home/athompson/core.6791
> /home/aucoind/core.22328
> /home/barrowsc/core.5070
> /home/bibersteins/core.24006
> /home/bibersteins/core.9923
> /home/blakem/core.16903
> /home/blakem/core.27395
> /home/blakem/core.27747
> /home/blakem/core.29009
> /home/blakem/core.6063
> /home/blakem/core.9060
> /home/bottingryan/core.29282
> /home/bottingryan/core.7044
> /home/boucherc/core.10176
> ~~~~~~~~~~~~~~~~~~~~~~~
> Alan Owen
> Assistant to the Director of Information Services
> Hermon Information Services/Hermon School Department
> "Using Technology to Empower All Students to Succeed in a Changing World."
> ~~~~~~~~~~~~~~~~~~~~~~~
> _______________________________________________
> K12OSN mailing list
> K12OSN at redhat.com
> https://www.redhat.com/mailman/listinfo/k12osn
> For more info see <http://www.k12os.org>
James P. Kinney III          
CEO & Director of Engineering 
Local Net Solutions,LLC        

GPG ID: 829C6CA7 James P. Kinney III (M.S. Physics)
<jkinney at localnetsolutions.com>
Fingerprint = 3C9E 6366 54FC A3FE BA4D 0659 6190 ADC3 829C 6CA7
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