I need to apply "ulimit -s 256" to any system thread. Is there any way to achieve this under Ubuntu Server?

  • 1
    What about /etc/security/limits.conf ? Doesn't it solve the problem?
    – HUB
    Jul 20, 2011 at 13:07

2 Answers 2


You can set user limits via pam_limits in /etc/security/limits.conf. See man limits.conf for informations about this file.


On Ubuntu 12.04 /etc/security/limits.conf does not appear to be read unless the following is added to /etc/pam.d/common-session.

session required pam_limits.so

Even then, it's not clear to me if it is picked up for programs started by upstart scripts.

  • 1
    Note that there is also a commented line in /etc/pam.d/su: # session required pam_limits.so. Jan 17, 2013 at 8:00

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