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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | FILES | NOTES | HISTORY | EXAMPLES | SEE ALSO | AVAILABILITY | COLOPHON |
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RENICE(1) User Commands RENICE(1)
renice - alter priority of running processes
renice [-n] priority [-g|-p|-u] identifier...
renice alters the scheduling priority of one or more running
processes. The first argument is the priority value to be used.
The other arguments are interpreted as process IDs (by default),
process group IDs, user IDs, or user names. renice'ing a process
group causes all processes in the process group to have their
scheduling priority altered. renice'ing a user causes all
processes owned by the user to have their scheduling priority
altered.
-n, --priority priority
Specify the scheduling priority to be used for the
process, process group, or user. Use of the option -n or
--priority is optional, but when used it must be the first
argument.
-g, --pgrp
Interpret the succeeding arguments as process group IDs.
-p, --pid
Interpret the succeeding arguments as process IDs (the
default).
-u, --user
Interpret the succeeding arguments as usernames or UIDs.
-V, --version
Display version information and exit.
-h, --help
Display help text and exit.
/etc/passwd
to map user names to user IDs
Users other than the superuser may only alter the priority of
processes they own. Furthermore, an unprivileged user can only
increase the ``nice value'' (i.e., choose a lower priority) and
such changes are irreversible unless (since Linux 2.6.12) the
user has a suitable ``nice'' resource limit (see ulimit(1p) and
getrlimit(2)).
The superuser may alter the priority of any process and set the
priority to any value in the range -20 to 19. Useful priorities
are: 19 (the affected processes will run only when nothing else
in the system wants to), 0 (the ``base'' scheduling priority),
anything negative (to make things go very fast).
The renice command appeared in 4.0BSD.
The following command would change the priority of the processes
with PIDs 987 and 32, plus all processes owned by the users
daemon and root:
renice +1 987 -u daemon root -p 32
nice(1), chrt(1), getpriority(2), setpriority(2), credentials(7),
sched(7)
The renice command is part of the util-linux package and is
available 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
2020-12-18. (At that time, the date of the most recent commit
that was found in the repository was 2020-12-17.) 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 July 2014 RENICE(1)
Pages that refer to this page: chrt(1), kill(1@@procps-ng), nice(1), skill(1), taskset(1), getpriority(2), nice(2)
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