renice --version (return code: 0)
renice from util-linux 2.27.1
renice --help (return code: 0)
Usage:
renice [-n] <priority> [-p|--pid] <pid>...
renice [-n] <priority> -g|--pgrp <pgid>...
renice [-n] <priority> -u|--user <user>...
Alter the priority of running processes.
Options:
-n, --priority <num> specify the nice increment value
-p, --pid <id> interpret argument as process ID (default)
-g, --pgrp <id> interpret argument as process group ID
-u, --user <name>|<id> interpret argument as username or user ID
-h, --help display this help and exit
-V, --version output version information and exit
For more details see renice(1).