explain the commands below Post: 302265745

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LEARN ABOUT X11R4

renice

RENICE(1)							   User Commands							 RENICE(1)

NAME

       renice - alter priority of running processes

SYNOPSIS

       renice [-n] priority [-g|-p|-u] 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
	      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.

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 superuser may only alter the priority of processes they own.  Furthermore, an unprivileged user can only increase  the
       ``nice  value''	(i.e.,	choose	a  lower  priority)  and such changes are irreversible unless (since Linux 2.6.12) the user has a suitable
       ``nice'' resource limit (see ulimit(1) and getrlimit(2)).

       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).

FILES

       /etc/passwd
	      to map user names to user IDs

SEE ALSO

       nice(1), getpriority(2), setpriority(2), credentials(7), sched(7)

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

util-linux							     July 2014								 RENICE(1)