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UNIX in a Nutshell: System V Edition

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nice

nicen] command

Change the execution priority for command, or, if none is given, change priority for the current shell. (See also nice in Section 2.) The priority range is -20 to 20, with a default of 4. The range seems backwards: -20 gives the highest priority (fastest execution); 20 gives the lowest.

+n

Add n to the priority value (lower job priority).

-n

Subtract n from the priority value (raise job priority). Privileged users only.


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