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Nice

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Reference:www.tecmint.com
Man page:nice

Overview ​

Run a program with modified scheduling priority. Nice levels range from -20 (highest priority) to 19 (lowest priority).

  • Without nice the default nice level is 0.
  • With nice the default nice level is 10.
  • Negative nice levels require elevated rights (sudo).

Check the nice level of a running process with top or ps -eO ni.

Usage ​

shell
nice OPTION COMMAND
OptionDescription
-n --adjustmentAdd integer N to the niceness.

Example ​

Start process with nice level of 5:

shell
nice -n 5 command

Start process with nice level of -5 (and still run it as a user):

fish
sudo -E nice -n -5 sudo -Eu (whoami) command

Changing the limit ​

If you do not want to use sudo everytime, edit /etc/security/limits.conf:

ini
#<domain>      <type>  <item>         <value>
@wheel         -       nice           -5