I'm banging my head on this, and I can't understand why it's not working. I'm hoping that someone can shed light on this, or failing that, give me some suggestions for avenues of investigation.
I've got a Red Hat 7.3 system (don't ask) where it's desirable to increase the open files limit for the
wls81 user. I thought that I was just not able to control it, but it increasingly looks as if I've only got the problem with the user I need to change. I've added the following lines to
wls81 soft nofile 10100 wls81 hard nofile 10240 madhatta soft nofile 10100 madhatta hard nofile 10240
pam_limits.so is being properly invoked, as far as I can tell:
[madhatta@server madhatta]$ sudo grep limits /etc/pam.d/* /etc/pam.d/login:session required /lib/security/pam_limits.so /etc/pam.d/sshd:session required /lib/security/pam_limits.so /etc/pam.d/su:session required /lib/security/pam_limits.so /etc/pam.d/system-auth:session required /lib/security/pam_limits.so
When I ssh in as myself, I get the new soft limit, and can increase up to the hard limit:
desktop> ssh server Last login: Thu May 10 13:20:13 2012 from a.b.c.d [madhatta@server madhatta]$ ulimit -n 10100 [madhatta@server madhatta]$ ulimit -n 10200 [madhatta@server madhatta]$ ulimit -n 10200 [madhatta@server madhatta]$ ulimit -n 10300 bash: ulimit: cannot modify open files limit: Operation not permitted
but when I ssh in as the
wls81 user, I can't:
desktop> ssh wls81@server Last login: Wed May 9 22:29:33 2012 from a.b.c.d [wls81@server wls81]$ ulimit -n 1024 [wls81@server wls81]$ ulimit -n 10000 bash: ulimit: cannot modify open files limit: Operation not permitted
The same happens when I
su - to each user. I honestly can't see why this user's not able to have its
ulimits reset. Anyone have any ideas?