limits.conf

#/etc/security/limits.conf
#Each line describes a limit for a user in the form:
###
###<domain>        <type>  <item>  <value>
###
###Where:
###<domain> can be:
###        - a user name
###        - a group name, with @group syntax
###        - the wildcard *, for default entry
###        - the wildcard %, can be also used with %group syntax,
###                 for maxlogin limit
###
###<type> can have the two values:
###        - "soft" for enforcing the soft limits
###        - "hard" for enforcing hard limits
###
###<item> can be one of the following:
###        - core - limits the core file size (KB)
###        - data - max data size (KB)
###        - fsize - maximum filesize (KB)
###        - memlock - max locked-in-memory address space (KB)
###        - nofile - max number of open file descriptors
###        - rss - max resident set size (KB)
###        - stack - max stack size (KB)
###        - cpu - max CPU time (MIN)
###        - nproc - max number of processes
###        - as - address space limit (KB)
###        - maxlogins - max number of logins for this user
###        - maxsyslogins - max number of logins on the system
###        - priority - the priority to run user process with
###        - locks - max number of file locks the user can hold
###        - sigpending - max number of pending signals
###        - msgqueue - max memory used by POSIX message queues (bytes)
###        - nice - max nice priority allowed to raise to values: [-20, 19]
###        - rtprio - max realtime priority
###
###<domain>      <type>  <item>         <value>
###
##
###*               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
#
# End of file
*       soft memlock unlimited
*       hard memlock unlimited
*       soft    rss          -1
*       hard    rss          -1
*       soft    maxlogins     8192
*       hard    maxlogins     8192
*       soft    stack         -1
*       hard    stack         -1
*       soft    nproc         2067554
*       hard    nproc         2067554
*       soft    nofile      125000
*       hard    nofile      125000