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RENICE(1)				  User Commands 				RENICE(1)

NAME
       renice - alter priority of running processes

SYNOPSIS
       renice [-n] priority [-gpu] identifier...

DESCRIPTION
       renice  alters  the scheduling priority of one or more running processes.  The first argu-
       ment 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 pgid...
	      Force the succeeding arguments to be interpreted as process group IDs.

       -u, --user name_or_uid...
	      Force the succeeding arguments to be interpreted as usernames or UIDs.

       -p, --pid pid...
	      Force the succeeding arguments to be interpreted as process IDs (the default).

       -h, --help
	      Display a help text.

       -V, --version
	      Display version information.

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 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).

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

SEE ALSO
       getpriority(2), setpriority(2)

BUGS
       Non  super-users  can  not  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.

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 <ftp://ftp.kernel.org/pub/linux/utils/util-linux/>.

util-linux				  September 2011				RENICE(1)
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