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
a /etc/rc making all swap devices available, so that the paging and swapping activity is interleaved across several devices.
p Normally, the first form is used: l -tag -width Ds t Fl a All devices marked as ``sw'' swap devices in
a /etc/fstab are made available. .El
p 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 l -tag -width /dev/[ru][pk]?b -compact t Pa /dev/[ru][pk]?b standard paging devices t 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 x 4.0 .