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NAME | SYNOPSIS | DESCRIPTION | GENERAL OPTIONS | RESOURCE OPTIONS | NOTES | EXAMPLES | AUTHORS | SEE ALSO | REPORTING BUGS | AVAILABILITY |
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PRLIMIT(1) User Commands PRLIMIT(1)
prlimit - get and set process resource limits
prlimit [options] [--resource[=limits]] [--pid PID]
prlimit [options] [--resource[=limits]] command [argument...]
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.
--noheadings
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 PID
Specify the process ID. Without this option (and without a
command), the running process will be used.
--raw
Use the raw output format.
--verbose
Verbose mode.
-h, --help
Display help text and exit.
-V, --version
Display 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.
The prlimit(2) system call is supported since Linux 2.6.36, older
kernels will break this program.
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,
respectively.
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).
Davidlohr Bueso <dave@gnu.org> - In memory of Dennis M. Ritchie.
ulimit(1p), prlimit(2)
For bug reports, use the issue tracker
<https://github.com/util-linux/util-linux/issues>.
The prlimit command is part of the util-linux package which can be
downloaded from Linux Kernel Archive
<https://www.kernel.org/pub/linux/utils/util-linux/>. This page is
part of the util-linux (a random collection of Linux utilities)
project. Information about the project can be found at
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have a
bug report for this manual page, send it to
util-linux@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
2025-08-11. (At that time, the date of the most recent commit that
was found in the repository was 2025-08-05.) 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 man-pages@man7.org
util-linux 2.42-start-521-ec46 2025-08-09 PRLIMIT(1)
Pages that refer to this page: getrlimit(2), cgroups(7)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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