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| 33 | .\" @(#)nice.1 6.7 (Berkeley) 7/24/91 |
| 34 | .\" |
| 35 | .Dd July 24, 1991 |
| 36 | .Dt NICE 1 |
| 37 | .Os BSD 4 |
| 38 | .Sh NAME |
| 39 | .Nm nice |
| 40 | .Nd execute a Bourne shell command at a low scheduling priority |
| 41 | .Sh SYNOPSIS |
| 42 | .Nm nice |
| 43 | .Op Fl Ns Ar number |
| 44 | .Ar command |
| 45 | .Op Ar arguments |
| 46 | .Sh DESCRIPTION |
| 47 | .Nm Nice |
| 48 | runs |
| 49 | .Ar command |
| 50 | at a low priority. |
| 51 | (Think of low and slow). |
| 52 | If |
| 53 | .Fl Ns Ar number |
| 54 | is specified, and if it is greater than or equal |
| 55 | to 10 (the default), |
| 56 | .Nm nice |
| 57 | will execute |
| 58 | .Ar command |
| 59 | at that priority. |
| 60 | The upper bound, or lowest priority that |
| 61 | .Nm nice |
| 62 | will run a command is 20. |
| 63 | The lower bounds or |
| 64 | higher priorities (integers less than 10) |
| 65 | can only be requested by the super-user. |
| 66 | Negative numbers are expressed as |
| 67 | .Fl - Ns Ar number . |
| 68 | .Pp |
| 69 | The returned exit status is the exit value from the |
| 70 | command executed by |
| 71 | .Nm nice . |
| 72 | .Sh SEE ALSO |
| 73 | .Xr csh 1 , |
| 74 | .Xr renice 8 |
| 75 | .Sh HISTORY |
| 76 | A |
| 77 | .Nm nice |
| 78 | command appeared in |
| 79 | .At v6 . |
| 80 | .Sh BUGS |
| 81 | .Nm Nice |
| 82 | is particular to |
| 83 | .Xr sh 1 . |
| 84 | If you use |
| 85 | .Xr csh 1 , |
| 86 | then commands executed with ``&'' are automatically immune to hangup |
| 87 | signals while in the background. |
| 88 | .Pp |
| 89 | .Nm Nice |
| 90 | is built into |
| 91 | .Xr csh 1 |
| 92 | with a slightly different syntax than described here. The form |
| 93 | .Ql nice +10 |
| 94 | nices to positive nice, and |
| 95 | .Ql nice \-10 |
| 96 | can be used |
| 97 | by the super-user to give a process more of the processor. |