NAME
pam_limits - PAM module to limit resourcesSYNOPSIS
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.confIndicate 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. Please
note that if the init process is systemd these limits will not be the kernel
default limits and this option should not be used.
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_ABORTCannot 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.
PAM_SESSION_ERR
Error recovering account name.
PAM_SUCCESS
Limits were changed.
PAM_USER_UNKNOWN
The user is not known to the system.
FILES
/etc/security/limits.confDefault 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
SEE ALSO
limits.conf(5), pam.d(5), pam(7).AUTHORS
pam_limits was initially written by Cristian Gafton <[email protected]>09/03/2021 | Linux-PAM Manual |