# phpman > man > PAM_LIMITS(8)

[PAM_LIMITS(8)](https://www.chedong.com/phpMan.php/man/PAMLIMITS/8/markdown)                             Linux-PAM Manual                             [PAM_LIMITS(8)](https://www.chedong.com/phpMan.php/man/PAMLIMITS/8/markdown)



## 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. 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_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.

       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.conf
           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)](https://www.chedong.com/phpMan.php/man/limits.conf/5/markdown), [**pam.d**(5)](https://www.chedong.com/phpMan.php/man/pam.d/5/markdown), [**pam**(7)](https://www.chedong.com/phpMan.php/man/pam/7/markdown).

## AUTHORS
       pam_limits was initially written by Cristian Gafton <<gafton@redhat.com>>



Linux-PAM Manual                             06/08/2020                                [PAM_LIMITS(8)](https://www.chedong.com/phpMan.php/man/PAMLIMITS/8/markdown)