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       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.

       -h, --help
              Display help text and exit.

       -V, --version
              Display version information 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''
       scheduling priority), anything negative (to make things go very fast).


              to map user names to user IDs


       getpriority(2), setpriority(2)


       Non-superusers  cannot  increase  scheduling  priorities  of  their own
       processes, 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
       version 5.2.18) does not agree entirely on what the  specifics  of  the
       systemcall  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 ⟨

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