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pam_limits — PAM module to limit resources
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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.
EXAMPLES
These are some example lines which might be specified in /etc/security/
limits.conf.
* soft core 0
* hard nofile 512
@student hard nproc 20
@faculty soft nproc 20
@faculty hard nproc 50
ftp hard nproc 0
@student - maxlogins 4
:123 hard cpu 5000
@500: soft cpu 10000
600:700 hard locks 10
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