limits.conf man page on YellowDog

Man page or keyword search:  
man Server   18644 pages
apropos Keyword Search (all sections)
Output format
YellowDog logo
[printable version]

LIMITS.CONF(5)		       Linux-PAM Manual			LIMITS.CONF(5)

NAME
       limits.conf - configuration file for the pam_limits module

DESCRIPTION
       The syntax of the lines is as follows:

       <domain> <type> <item> <value>

       The fields listed above should be filled as follows:

       <domain>

	  ·  a username

	  ·  a groupname, with @group syntax. This should not be confused with
	     netgroups.

	  ·  the wildcard *, for default entry.

	  ·  the wildcard %, for maxlogins limit only, can also be used with
	     %group syntax.

       <type>

	  hard
	     for enforcing hard resource limits. These limits are set by the
	     superuser and enforced by the Kernel. The user cannot raise his
	     requirement of system resources above such values.

	  soft
	     for enforcing soft resource limits. These limits are ones that
	     the user can move up or down within the permitted range by any
	     pre-exisiting hard limits. The values specified with this token
	     can be thought of as default values, for normal system usage.

	  -  for enforcing both soft and hard resource limits together.

	     Note, if you specify a type of '-' but neglect to supply the item
	     and value fields then the module will never enforce any limits on
	     the specified user/group etc. .

       <item>

	  core
	     limits the core file size (KB)

	  data
	     maximum data size (KB)

	  fsize
	     maximum filesize (KB)

	  memlock
	     maximum locked-in-memory address space (KB)

	  nofile
	     maximum number of open files

	  rss
	     maximum resident set size (KB)

	  stack
	     maximum stack size (KB)

	  cpu
	     maximum CPU time (minutes)

	  nproc
	     maximum number of processes

	  as address space limit

	  maxlogins
	     maximum number of logins for this user

	  maxsyslogins
	     maximum number of logins on system

	  priority
	     the priority to run user process with (negative values boost
	     process priority)

	  locks
	     maximum locked files (Linux 2.4 and higher)

	  sigpending
	     maximum number of pending signals (Linux 2.6 and higher)

	  msqqueue
	     maximum memory used by POSIX message queues (bytes) (Linux 2.6
	     and higher)

	  nice
	     maximum nice priority allowed to raise to (Linux 2.6.12 and
	     higher)

	  rtprio
	     maximum realtime priority allowed for non-privileged processes
	     (Linux 2.6.12 and higher)

       In general, individual limits have priority over group limits, so if
       you impose no limits for admin group, but one of the members in this
       group have a limits line, the user will have its limits set according
       to this line.

       Also, please note that all limit settings are set per login. They are
       not global, nor are they permanent; existing only for the duration of
       the session.

       In the limits configuration file, the '#' character introduces a
       comment - after which the rest of the line is ignored.

       The pam_limits module does its best to report configuration problems
       found in its configuration file via syslog(3).

EXAMPLES
       These are some example lines which might be specified in
       /etc/security/limits.conf.

	  *		  soft	  core		  0
	  *		  hard	  rss		  10000
	  @student	  hard	  nproc		  20
	  @faculty	  soft	  nproc		  20
	  @faculty	  hard	  nproc		  50
	  ftp		  hard	  nproc		  0
	  @student	  -	  maxlogins	  4

SEE ALSO
       pam_limits(8), pam.d(5), pam(8)

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

Linux-PAM Manual		  06/22/2006			LIMITS.CONF(5)
[top]

List of man pages available for YellowDog

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net