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e16dc90a C |
1 | .TH NICE 1 "18 January 1983" |
2 | .UC 4 | |
3 | .SH NAME | |
4 | nice, nohup \- run a command at low priority (\fIsh\fR only) | |
5 | .SH SYNOPSIS | |
6 | .B nice | |
7 | [ | |
8 | .BI \- number | |
9 | ] | |
10 | command [ arguments ] | |
11 | .PP | |
12 | .B nohup | |
13 | command [ arguments ] | |
14 | .SH DESCRIPTION | |
15 | .I Nice | |
16 | executes | |
17 | .I command | |
18 | with low scheduling priority. | |
19 | If the | |
20 | .I number | |
21 | argument is present, the priority is incremented (higher | |
22 | numbers mean lower priorities) by that amount up to a limit of 20. | |
23 | The default | |
24 | .I number | |
25 | is 10. | |
26 | .PP | |
27 | The super-user may run commands with | |
28 | priority higher than normal | |
29 | by using a negative priority, | |
30 | e.g. `\-\-10'. | |
31 | .PP | |
32 | .I Nohup | |
33 | executes | |
34 | .I command | |
35 | immune to hangup and terminate signals from the controlling terminal. | |
36 | The priority is incremented by 5. | |
37 | .I Nohup | |
38 | should be invoked from the shell with `&' in order to | |
39 | prevent it from responding to interrupts by or | |
40 | stealing the input from | |
41 | the next person who logs in on the same terminal. | |
42 | The syntax of nice is also different. | |
43 | .SH FILES | |
44 | nohup.out standard output and standard error file under | |
45 | .I nohup | |
46 | .SH "SEE ALSO" | |
47 | csh(1), nice(2), renice(8) | |
48 | .SH DIAGNOSTICS | |
49 | .I Nice | |
50 | returns the exit status of the subject command. | |
51 | .SH BUGS | |
52 | .I Nice | |
53 | and | |
54 | .I nohup | |
55 | are particular to | |
56 | .IR sh (1). | |
57 | If you use | |
58 | .IR csh (1), | |
59 | then commands executed with ``&'' are automatically immune to hangup | |
60 | signals while in the background. | |
61 | There is a builtin command | |
62 | .I nohup | |
63 | which provides immunity from terminate, but it does not | |
64 | redirect output to | |
65 | .I nohup.out. | |
66 | .PP | |
67 | .I Nice | |
68 | is built into | |
69 | .IR csh (1) | |
70 | with a slightly different syntax than described here. The form | |
71 | ``nice +10'' nices to positive nice, and ``nice \-10'' can be used | |
72 | by the super-user to give a process more of the processor. |