renice

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.

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

       -h, --help
              Display help text 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)

AVAILABILITY
       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/⟩.



util-linux                          July 2014                          RENICE(1)