.\" Copyright (c) 1980, 1990 The Regents of the University of California. .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms are permitted provided .\" that: (1) source distributions retain this entire copyright notice and .\" comment, and (2) distributions including binaries display the following .\" acknowledgement: ``This product includes software developed by the .\" University of California, Berkeley and its contributors'' in the .\" documentation or other materials provided with the distribution and in .\" all advertising materials mentioning features or use of this software. .\" Neither the name of the University nor the names of its contributors may .\" be used to endorse or promote products derived from this software without .\" specific prior written permission. .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. .\" .\" @(#)nice.1 6.5 (Berkeley) 7/24/90 .\" .Dd July 24, 1990 .Dt NICE 1 .Os BSD 4 .Sh NAME .Nm nice .Nd execute a Bourne shell command at a low scheduling priority .Sh SYNOPSIS .Nm nice .Oo .Op Fl Ar number .Oo .Ar command .Op Ar arguments .Sh DESCRIPTION .Nm Nice runs .Ar command at a low priority. (Think of low and slow). If .Ar \-number is specified, and if it is greater than or equal to 10 (the default), .Nm nice will execute .Ar command at that priority. The upper bound, or lowest priority that .Nm nice will run a command is 20. The lower bounds or higher priorities (integers less than 10) can only be requested by the super-user. Negative numbers are expressed as .Ar \-\-number. .Pp The returned exit status is the exit value from the command executed by .Nm nice . .Sh SEE ALSO .Xr csh 1 , .Xr renice 8 .Sh HISTORY .Nm Nice appeared in Version 6 AT&T UNIX. .Sh BUGS .Nm Nice is particular to .Xr sh 1 . If you use .Xr csh 1 , then commands executed with ``&'' are automatically immune to hangup signals while in the background. .Pp .Nm Nice is built into .Xr 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.