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[linuxjm/jm.git] / manual / SysVinit / original / man8 / runlevel.8

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+.TH RUNLEVEL 8 "May 27, 1997" "" "Linux System Administrator's Manual"
+.SH NAME
+runlevel -- find the current and previous system runlevel.
+.SH SYNOPSIS
+.B runlevel 
+.RI [ utmp ]
+.SH DESCRIPTION
+.B Runlevel
+reads the system
+.I utmp
+file (typically 
+.IR /var/run/utmp )
+to locate the runlevel record, and then
+prints the previous and current system runlevel on its standard output, 
+separated by a single space. If there is no previous system
+runlevel, the letter \fBN\fP will be printed instead.
+.PP
+If no
+.I utmp
+file exists, or if no runlevel record can be found,
+.B runlevel
+prints the word \fBunknown\fP and exits with an error.
+.PP
+.B Runlevel
+can be used in \fIrc\fP scripts as a substitute for the System-V
+\fBwho -r\fP command. 
+However, in newer versions of \fBinit\fP(8) this information
+is also available in the environment variables \fBRUNLEVEL\fP and
+\fBPREVLEVEL\fP.
+.SH OPTIONS
+.\"{{{ utmp
+.IP \fIutmp\fP 
+The name of the \fIutmp\fP file to read.
+.\"}}}
+.SH SEE ALSO
+.BR init (8),
+.BR utmp (5)
+.SH AUTHOR
+Miquel van Smoorenburg, miquels@cistron.nl