prlimit(1) — Linux manual page


PRLIMIT(1)                      User Commands                     PRLIMIT(1)

NAME         top

       prlimit - get and set process resource limits

SYNOPSIS         top

       prlimit [options] [--resource[=limits] [--pid PID]

       prlimit [options] [--resource[=limits] command [argument...]

DESCRIPTION         top

       Given a process ID and one or more resources, prlimit tries to
       retrieve and/or modify the limits.

       When command is given, prlimit will run this command with the given

       The limits parameter is composed of a soft and a hard value,
       separated by a colon (:), in order to modify the existing values.  If
       no limits are given, prlimit will display the current values.  If one
       of the values is not given, then the existing one will be used.  To
       specify the unlimited or infinity limit (RLIM_INFINITY), the -1 or
       'unlimited' string can be passed.

       Because of the nature of limits, the soft limit must be lower or
       equal to the high limit (also called the ceiling).  To see all
       available resource limits, refer to the RESOURCE OPTIONS section.

       soft:hard    Specify both limits.

       soft:        Specify only the soft limit.

       :hard        Specify only the hard limit.

       value        Specify both limits to the same value.


       -h, --help
              Display help text and exit.

              Do not print a header line.

       -o, --output list
              Define the output columns to use.  If no output arrangement is
              specified, then a default set is used.  Use --help to get a
              list of all supported columns.

       -p, --pid
              Specify the process id; if none is given, the running process
              will be used.

       --raw  Use the raw output format.

              Verbose mode.

       -V, --version
              Display version information and exit.


       -c, --core[=limits]
              Maximum size of a core file.

       -d, --data[=limits]
              Maximum data size.

       -e, --nice[=limits]
              Maximum nice priority allowed to raise.

       -f, --fsize[=limits]
              Maximum file size.

       -i, --sigpending[=limits]
              Maximum number of pending signals.

       -l, --memlock[=limits]
              Maximum locked-in-memory address space.

       -m, --rss[=limits]
              Maximum Resident Set Size (RSS).

       -n, --nofile[=limits]
              Maximum number of open files.

       -q, --msgqueue[=limits]
              Maximum number of bytes in POSIX message queues.

       -r, --rtprio[=limits]
              Maximum real-time priority.

       -s, --stack[=limits]
              Maximum size of the stack.

       -t, --cpu[=limits]
              CPU time, in seconds.

       -u, --nproc[=limits]
              Maximum number of processes.

       -v, --as[=limits]
              Address space limit.

       -x, --locks[=limits]
              Maximum number of file locks held.

       -y, --rttime[=limits]
              Timeout for real-time tasks.

NOTES         top

       The prlimit system call is supported since Linux 2.6.36, older
       kernels will break this program.

EXAMPLES         top

       prlimit --pid 13134
              Display limit values for all current resources.

       prlimit --pid 13134 --rss --nofile=1024:4095
              Display the limits of the RSS, and set the soft and hard
              limits for the number of open files to 1024 and 4095,

       prlimit --pid 13134 --nproc=512:
              Modify only the soft limit for the number of processes.

       prlimit --pid $$ --nproc=unlimited
              Set for the current process both the soft and ceiling values
              for the number of processes to unlimited.

       prlimit --cpu=10 sort -u hugefile
              Set both the soft and hard CPU time limit to ten seconds and
              run 'sort'.

AUTHORS         top

       Davidlohr Bueso <> - In memory of Dennis M. Ritchie.

SEE ALSO         top

       ulimit(1p), prlimit(2)

AVAILABILITY         top

       The prlimit command is part of the util-linux package and is
       available from

COLOPHON         top

       This page is part of the util-linux (a random collection of Linux
       utilities) project.  Information about the project can be found at 
       ⟨⟩.  If you have a
       bug report for this manual page, send it to  This page was obtained from the
       project's upstream Git repository
       ⟨git://⟩ on
       2020-09-18.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-09-15.)  If you discover any
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       (which is not part of the original manual page), send a mail to

util-linux                        July 2014                       PRLIMIT(1)

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