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  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.

       -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.

       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

       Users other than the superuser 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  19,  unless  a  nice  resource
       limit  is  set  (Linux 2.6.12 and higher).  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''  sched-
       uling priority), anything negative (to make things go very fast).

              to map user names to user IDs

       nice(1), getpriority(2), setpriority(2)

       Non-superusers  cannot increase scheduling priorities of their own pro-
       cesses, even if they were the ones that decreased the priorities in the
       first place.

       The Linux kernel (at least version 2.0.0) and linux libc (at least ver-
       sion 5.2.18) does not agree entirely on what the specifics of the  sys-
       temcall  interface to set nice values is.  Thus causes renice to report
       bogus previous nice values.

       The renice command appeared in 4.0BSD.

       The renice command is part of the util-linux package and  is  available
       from  Linux  Kernel Archive <

util-linux                         July 2014                         RENICE(1)
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