BSD 4.4 Lite sbin Sources

Note:  XNSrouted and routed NOT imported here, they shall be imported with
usr.sbin.

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+.\" Copyright (c) 1980, 1991, 1993
+.\"	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.
+.\"
+.\"     @(#)swapon.8	8.1 (Berkeley) 6/5/93
+.\"
+.Dd June 5, 1993
+.Dt SWAPON 8
+.Os BSD 4
+.Sh NAME
+.Nm swapon
+.Nd "specify additional device for paging and swapping"
+.Sh SYNOPSIS
+.Nm swapon
+.Fl a
+.Nm swapon
+.Ar special_file ...
+.Sh DESCRIPTION
+.Nm Swapon
+is used to specify additional devices on which paging and swapping
+are to take place.
+The system begins by swapping and paging on only a single device
+so that only one disk is required at bootstrap time.
+Calls to
+.Nm swapon
+normally occur in the system multi-user initialization file
+.Pa /etc/rc
+making all swap devices available, so that the paging and swapping
+activity is interleaved across several devices.
+.Pp
+Normally, the first form is used:
+.Bl -tag -width Ds
+.It Fl a
+All devices marked as ``sw''
+swap devices in
+.Pa /etc/fstab
+are made available.
+.El
+.Pp
+The second form gives individual block devices as given
+in the system swap configuration table.  The call makes only this space
+available to the system for swap allocation.
+.Sh SEE ALSO
+.Xr swapon 2 ,
+.Xr fstab 8
+.Xr init 8
+.Xr rc 8
+.Sh FILES
+.Bl -tag -width /dev/[ru][pk]?b -compact
+.It Pa /dev/[ru][pk]?b
+standard paging devices
+.It Pa /etc/fstab
+ascii filesystem description table
+.El
+.Sh BUGS
+There is no way to stop paging and swapping on a device.
+It is therefore not possible to make use of devices which may be
+dismounted during system operation.
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Bx 4.0 .