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 firstname.lastname@example.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 email@example.com 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)