Linux basic command-appreciation program priority nice

Nice

The nice instruction can set the priority of running the program, and the priority will affect the scheduling time of the program. The range of nice is-20 to 19, where-20 is the highest and 19 is the lowest.

The scope of this command: RedHat, RHEL, Ubuntu, CentOS, SUSE, openSUSE, Fedora.

1. Grammar

Nice [options] [cmd]

2. List of options

Option

Description

-- help

Show help documentation

-- version

Show command version

-n |-- adjustment=N

Set priority

3. Examples

1) set instruction wc priority

[root@localhost ~] # nice-n 19 wc / / sets the lowest priority for wc

^ Z / / Press the key combination ctrl+z [2] + Stopped nice-n 19 wc

[root@localhost ~] #

2) View process priority

[root@localhost ~] # ps-ao "% p%y%x%c%n" / / View process level, wc level is 19

PID TTY TIME COMMAND NI

8321 pts/0 00:00:00 wc 19

8370 pts/0 00:00:00 ps 0