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LEARN ABOUT CENTOS

renice

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 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.

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)

Linux