.TH NICE 1
.SH NAME
nice, nohup \- run a command at low priority
.SH SYNOPSIS
.BR nice " [" - "number] command"
.PP
.BR "nice -l" "level command"
.PP
.BR "nice -l" level " -p" pid
.PP
.BR nohup " command"
.SH DESCRIPTION
.I Nice\^
executes
.I command\^
with low scheduling priority.
If the
.I number\^
argument is present,
the scheduling level of the process is adjusted accordingly (see
.IR nice (2)).
The default
.I number\^
is 10.
The superuser may improve process scheduling levels by using a negative
.IR number ,
for example,
.BR \-\-10 .
.PP
If the \fB-l\fR flag is present, the number \fIlevel\fR immediately following the
flag is used to directly set the scheduling base level of the process
to \fIlevel\fR.  The legal range of \fIlevel\fR is 0 to 31, and only the superuser
can increase the \fIlevel\fR.
When the \fB-l\fR option is specified, the \fB-p\fR option may be present instead
of a \fIcommand\fR.  In this case, the level of the process with number \fIpid\fR
is changed to \fIlevel\fR.
The change of \fIlevel\fR is allowed only if the user is the superuser, or
has the same uid as the process specified.
.PP
.I Nohup\^
executes
.I command\^
immune to hangup and terminate signals from the controlling terminal.
The equivalent of a 'nice -5' is applied to the
command.
.I Nohup\^
should be invoked from the shell with `&' in order to 
prevent it from responding to interrupts by or
stealing the input from
the next person who logs in on the same terminal.
.SH FILES
nohup.out -- \fInohup\fR standard output and error file
.SH "SEE ALSO"
nice(2), setblev(2).
.SH DIAGNOSTICS
.BR "nice \-" "number command"
returns the exit status of the subject command.