The usage of the Linux basic command nice

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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

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