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A specific UNIX command that lets you run your background jobs
(See section Running jobs in the background) at low priority is the
nice command. It helps prevent compute-bound applications from
slowing down interactive use of the computer. This includes your own
interactive use in the foreground. nice accepts priority
numbers from 1 to 20, where higher numbers mean lower priority. For
example, to execute a program called number-cruncher at low priority
in the background, you could type nice +20 number-cruncher &
Enter the nice command this way when you're in the C shell. When
you're in the Bourne shell, enter it the same way except replace the
plus (+) before the 20 with a minus (-).
Note that there are 4 different forms of nice.
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