| 1 | .\" Copyright (c) 1980 Regents of the University of California. |
| 2 | .\" All rights reserved. The Berkeley software License Agreement |
| 3 | .\" specifies the terms and conditions for redistribution. |
| 4 | .\" |
| 5 | .\" @(#)nohup.1 6.2 (Berkeley) %G% |
| 6 | .\" |
| 7 | .TH NICE 1 "" |
| 8 | .UC 4 |
| 9 | .SH NAME |
| 10 | nice, nohup \- run a command at low priority (\fIsh\fR only) |
| 11 | .SH SYNOPSIS |
| 12 | .B nice |
| 13 | [ |
| 14 | .BI \- number |
| 15 | ] |
| 16 | command [ arguments ] |
| 17 | .PP |
| 18 | .B nohup |
| 19 | command [ arguments ] |
| 20 | .SH DESCRIPTION |
| 21 | .I Nice |
| 22 | executes |
| 23 | .I command |
| 24 | with low scheduling priority. |
| 25 | If the |
| 26 | .I number |
| 27 | argument is present, the priority is incremented (higher |
| 28 | numbers mean lower priorities) by that amount up to a limit of 20. |
| 29 | The default |
| 30 | .I number |
| 31 | is 10. |
| 32 | .PP |
| 33 | The super-user may run commands with |
| 34 | priority higher than normal |
| 35 | by using a negative priority, |
| 36 | e.g. `\-\-10'. |
| 37 | .PP |
| 38 | .I Nohup |
| 39 | executes |
| 40 | .I command |
| 41 | immune to hangup and terminate signals from the controlling terminal. |
| 42 | The priority is incremented by 5. |
| 43 | .I Nohup |
| 44 | should be invoked from the shell with `&' in order to |
| 45 | prevent it from responding to interrupts by or |
| 46 | stealing the input from |
| 47 | the next person who logs in on the same terminal. |
| 48 | .SH FILES |
| 49 | nohup.out standard output and standard error file under |
| 50 | .I nohup |
| 51 | .SH "SEE ALSO" |
| 52 | csh(1), setpriority(2), renice(8) |
| 53 | .SH DIAGNOSTICS |
| 54 | .I Nice |
| 55 | returns the exit status of the subject command. |
| 56 | .SH BUGS |
| 57 | .I Nice |
| 58 | and |
| 59 | .I nohup |
| 60 | are particular to |
| 61 | .IR sh (1). |
| 62 | If you use |
| 63 | .IR csh (1), |
| 64 | then commands executed with ``&'' are automatically immune to hangup |
| 65 | signals while in the background. |
| 66 | There is a builtin command |
| 67 | .I nohup |
| 68 | which provides immunity from terminate, but it does not |
| 69 | redirect output to |
| 70 | .I nohup.out. |
| 71 | .PP |
| 72 | .I Nice |
| 73 | is built into |
| 74 | .IR csh (1) |
| 75 | with a slightly different syntax than described here. The form |
| 76 | ``nice +10'' nices to positive nice, and ``nice \-10'' can be used |
| 77 | by the super-user to give a process more of the processor. |