The pam_limits PAM module sets limits on the system resources that
can be obtained in a user-session. Users of uid=0 are affected by
this limits, too.
By default limits are taken from the /etc/security/limits.conf config
file. Then individual *.conf files from the /etc/security/limits.d/
directory are read. The files are parsed one after another in the
order of "C" locale. The effect of the individual files is the same
as if all the files were concatenated together in the order of
parsing. If a config file is explicitly specified with a module
option then the files in the above directory are not parsed.
The module must not be called by a multithreaded application.
If Linux PAM is compiled with audit support the module will report
when it denies access based on limit of maximum number of concurrent
Indicate an alternative limits.conf style configuration file to
override the default.
Print debug information.
Set the limits for which no value is specified in the
configuration file to the one from the process with the PID 1.
Some broken applications actually allocate a utmp entry for the
user before the user is admitted to the system. If some of the
services you are configuring PAM for do this, you can selectively
use this module argument to compensate for this behavior and at
the same time maintain system-wide consistency with a single
Do not report exceeded maximum logins count to the audit
Cannot get current limits.
No limits found for this user.
New limits could not be set.
Cannot read config file.
Error recovering account name.
Limits were changed.
The user is not known to the system.
For the services you need resources limits (login for example) put a
the following line in /etc/pam.d/login as the last line for that
service (usually after the pam_unix session line):
# Resource limits imposed on login sessions via pam_limits
session required pam_limits.so
Replace "login" for each service you are using this module.
This page is part of the linux-pam (Pluggable Authentication Modules
for Linux) project. Information about the project can be found at
⟨https://fedorahosted.org/linux-pam/⟩. If you have a bug report for
this manual page, see ⟨https://fedorahosted.org/linux-pam/report⟩.
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fetched from ⟨http://www.linux-pam.org/library/⟩ on 2017-03-13. If
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Linux-PAM Manual 04/01/2016 PAM_LIMITS(8)