# prlimit(1) - man - phpMan

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## NAME
       prlimit - get and set process resource limits

## SYNOPSIS
       **prlimit** [options] [**--resource**[=_limits_]] [**--pid** _PID_]

       **prlimit** [options] [**--resource**[=_limits_]] _command_ [_argument_...]

## DESCRIPTION
       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.

## GENERAL OPTIONS
### -h, --help
           Display help text and exit.

### --noheadings
           Do not print a header line.

### -o, --output
           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
           Verbose mode.

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

## RESOURCE OPTIONS
### -c, --core
           Maximum size of a core file.

### -d, --data
           Maximum data size.

### -e, --nice
           Maximum nice priority allowed to raise.

### -f, --fsize
           Maximum file size.

### -i, --sigpending
           Maximum number of pending signals.

### -l, --memlock
           Maximum locked-in-memory address space.

### -m, --rss
           Maximum Resident Set Size (RSS).

### -n, --nofile
           Maximum number of open files.

### -q, --msgqueue
           Maximum number of bytes in POSIX message queues.

### -r, --rtprio
           Maximum real-time priority.

### -s, --stack
           Maximum size of the stack.

### -t, --cpu
           CPU time, in seconds.

### -u, --nproc
           Maximum number of processes.

### -v, --as
           Address space limit.

### -x, --locks
           Maximum number of file locks held.

### -y, --rttime
           Timeout for real-time tasks.

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

## EXAMPLES
### 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'.

## AUTHORS
       Davidlohr Bueso <<dave@gnu.org>> - In memory of Dennis M. Ritchie.

## SEE ALSO
       [**ulimit**(1p)](https://www.chedong.com/phpMan.php/man/ulimit/1p/markdown), [**prlimit**(2)](https://www.chedong.com/phpMan.php/man/prlimit/2/markdown)

## REPORTING BUGS
       For bug reports, use the issue tracker at <https://github.com/karelzak/util-linux/issues>.

## AVAILABILITY
       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/>>.



util-linux 2.37.2                            2021-07-20                                   [PRLIMIT(1)](https://www.chedong.com/phpMan.php/man/PRLIMIT/1/markdown)