NICE

Section: User Commands (1)
Updated: May 8, 1986
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NAME

nice, nohup - run a command at low priority (sh only)

SYNOPSIS

nice [ -number ] command [ arguments ]

nohup command [ arguments ]

DESCRIPTION

Nice executes command with low scheduling priority. If the number argument is present, the priority is incremented (higher numbers mean lower priorities) by that amount up to a limit of 20. The default number is 10.

The super-user may run commands with priority higher than normal by using a negative priority, e.g. `--10'.

Nohup executes command immune to hangup and terminate signals from the controlling terminal. The priority is incremented by 5. Nohup should be invoked from the shell with `&' in order to prevent it from responding to interrupts by or stealing the input from the next person who logs in on the same terminal.

SPRITE

Nice on Sprite maps Unix priorities in the range -20 to 20 into one of the five Sprite priorities. The mapping is done as follows:
-20 --- -20 -> -20
-19 --- -10 -> -10

-9 ---   9 ->  0

10 ---  19 -> 10

20 ---  20 -> 20

FILES

nohup.out standard output and standard error file under
nohup

DIAGNOSTICS

Nice returns the exit status of the subject command.

BUGS

Nice and nohup are particular to sh(1). If you use csh(1), then commands executed with ``&'' are automatically immune to hangup signals while in the background. There is a builtin command nohup which provides immunity from terminate, but it does not redirect output to nohup.out.

Nice is built into csh(1) with a slightly different syntax than described here. The form ``nice +10'' nices to positive nice, and ``nice -10'' can be used by the super-user to give a process more of the processor.

This document was created by man2html, using the manual pages.
Time: 04:54:17 GMT, January 31, 2023