nice.1 revision 1591
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@(#)nice.1 8.1 (Berkeley) 6/6/93
.Dd June 6, 1993 .Dt NICE 1 .Os BSD 4 .Sh NAME .Nm nice .Nd execute a command at a low scheduling priority .Sh SYNOPSIS .Nm nice .Op Fl Ns Ar number .Ar command .Op Ar arguments .Sh DESCRIPTION .Nm Nice runs .Ar command at a low priority. (Think of low and slow). If .Fl Ns 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 .Fl - Ns Ar number .
The Regents of the University of California. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by the University of
California, Berkeley and its contributors.
4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
@(#)nice.1 8.1 (Berkeley) 6/6/93
.Dd June 6, 1993 .Dt NICE 1 .Os BSD 4 .Sh NAME .Nm nice .Nd execute a command at a low scheduling priority .Sh SYNOPSIS .Nm nice .Op Fl Ns Ar number .Ar command .Op Ar arguments .Sh DESCRIPTION .Nm Nice runs .Ar command at a low priority. (Think of low and slow). If .Fl Ns 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 .Fl - Ns Ar number .
p 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 A .Nm nice command appeared in .At v6 . .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.
p .Nm Nice is built into .Xr csh 1 with a slightly different syntax than described here. The form .Ql nice +10 nices to positive nice, and .Ql nice -10 can be used by the super-user to give a process more of the processor.