PAM_LIMITS(8) Linux-PAM Manual PAM_LIMITS(8)
NAME
pam_limits - PAM module to limit resources
SYNOPSIS
pam_limits.so [conf=/path/to/limits.conf] [debug] [set_all] [utmp_early] [noaudit]
DESCRIPTION
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 login sessions.
OPTIONS
conf=/path/to/limits.conf
Indicate an alternative limits.conf style configuration file to override the default.
debug
Print debug information.
set_all
Set the limits for which no value is specified in the configuration file to the one from the process with
the PID 1.
utmp_early
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 limits.conf file.
noaudit
Do not report exceeded maximum logins count to the audit subsystem.
MODULE TYPES PROVIDED
Only the session module type is provided.
RETURN VALUES
PAM_ABORT
Cannot get current limits.
PAM_IGNORE
No limits found for this user.
PAM_PERM_DENIED
New limits could not be set.
PAM_SERVICE_ERR
Cannot read config file.
Default configuration file
EXAMPLES
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):
#%PAM-1.0
#
# Resource limits imposed on login sessions via pam_limits
#
session required pam_limits.so
Replace "login" for each service you are using this module.
SEE ALSO
limits.conf(5), pam.d(5), pam(8).
AUTHORS
pam_limits was initially written by Cristian Gafton <[email protected]>
Linux-PAM Manual 09/19/2013 PAM_LIMITS(8)
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