RENICE(1) User Commands RENICE(1)
NAME
renice - alter priority of running processes
SYNOPSIS
renice [-n] priority [-g|-p|-u] identifier...
DESCRIPTION
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.
OPTIONS
-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.
-h, --help
Display help text and exit.
-V, --version
Print version and exit.
FILES
/etc/passwd
to map user names to user IDs
NOTES
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).
HISTORY
The renice command appeared in 4.0BSD.
EXAMPLES
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
SEE ALSO
nice(1), chrt(1), getpriority(2), setpriority(2), credentials(7),
sched(7)
REPORTING BUGS
For bug reports, use the issue tracker at
https://github.com/util-linux/util-linux/issues.
AVAILABILITY
The renice 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 2.38.1 2022-05-11 RENICE(1)
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