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  argu-
       ments  are  interpreted as process IDs (by default), process group IDs,
       user IDs, or user names.  renice'ing a process group  causes  all  pro-
       cesses  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.

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

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 ir-
       reversible unless (since Linux 2.6.12) the user has a suitable ``nice''
       resource limit (see ulimit(1) and getrlimit(2)).

       The superuser may alter the priority of any process and set the  prior-
       ity  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).

FILES
       /etc/passwd
              to map user names to user IDs

SEE ALSO
       nice(1), getpriority(2), setpriority(2), credentials(7), sched(7)

HISTORY
       The renice command appeared in 4.0BSD.

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)