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 arguments.

       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.


           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.

           Use the raw output format.

           Verbose mode.

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

       -V, --version
           Print version 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(2) 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(1).

AUTHORS         top

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

SEE ALSO         top

       ulimit(1p), prlimit(2)

REPORTING BUGS         top

       For bug reports, use the issue tracker at

AVAILABILITY         top

       The prlimit command is part of the util-linux package which can
       be downloaded from Linux Kernel Archive
       <>. 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
       2024-06-14. (At that time, the date of the most recent commit
       that was found in the repository was 2024-06-10.) If you discover
       any rendering problems in this HTML version of the page, or you
       believe there is a better or more up-to-date source for the page,
       or you have corrections or improvements to the information in
       this COLOPHON (which is not part of the original manual page),
       send a mail to

util-linux 2.39.594-1e0ad      2023-08-25                     PRLIMIT(1)

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