renice [-n] priority [[-p] pid ...] [[-g] pgrp ...] [[-u] user ...]
     renice -h | -v

     Renice alters the scheduling priority of one or more running processes.
     The following who parameters are interpreted as process ID's, process
     group ID's, 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.  By default, the processes to be affected
     are specified by their process ID's.

     Options supported by renice:

     -n, --priority
             The scheduling priority of the process, process group, or user.

     -g, --pgrp
             Force who parameters to be interpreted as process group ID's.

     -u, --user
             Force the who parameters to be interpreted as user names.

     -p, --pid
             Resets the who interpretation to be (the default) process ID's.

     -v, --version
             Print version.

     -h, --help
             Print help.

     For example,

     renice +1 987 -u daemon root -p 32

     would change the priority of process ID's 987 and 32, and all processes
     owned by users daemon and root.

     Users other than the super-user may only alter the priority of processes
     they own, and can only monotonically increase their ``nice value'' (for
     security reasons) within the range 0 to PRIO_MAX (20), unless a nice
     resource limit is set (Linux 2.6.12 and higher).  The super-user may
     alter the priority of any process and set the priority to any value in
     the range PRIO_MIN (-20) to PRIO_MAX.  Useful priorities are: 20 (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).

     /etc/passwd  to map user names to user ID's

     getpriority(2), setpriority(2)

     The renice command is part of the util-linux package and is available

util-linux                     November 2010                        util-linux
Man Pages Copyright Respective Owners. Site Copyright (C) 1994 - 2019 Hurricane Electric. All Rights Reserved.