swapon, swapoff — enable/disable devices and files for paging and swapping
/sbin/swapon
[ −h
−V
]
/sbin/swapon
−a
[−v
] [−e
]
/sbin/swapon
[−v
] [ −p
priority ] specialfile...
/sbin/swapon
[−s
]
/sbin/swapoff
[
−h
−V
]
/sbin/swapoff
−a
/sbin/swapoff
specialfile...
Swapon
is used
to specify devices on which paging and swapping are to take
place.
The device or file used is given by the specialfile
parameter. It may
be of the form −L
label or −U
uuid to indicate a device by label
or uuid.
Calls to swapon normally occur in the system
multi-user initialization file /etc/rc
making all swap devices available,
so that the paging and swapping activity is interleaved
across several devices and files.
Normally, the first form is used:
−a
All devices marked as ``swap'' swap devices in
/etc/fstab
are made
available, except for those with the ``noauto'' option.
Devices that are already running as swap are silently
skipped.
−e
When −a
is used
with swapon, −e
makes
swapon silently skip devices that do not exist.
−h
Provide help
−L
label
Use the partition that has the specified label
. (For this,
access to /proc/partitions
is needed.)
−p
priority
Specify priority for swapon. This option is only
available if swapon was compiled under and
is used under a 1.3.2 or later kernel. priority
is a value
between 0 and 32767. Higher numbers indicate higher
priority. See swapon(2) for a full
description of swap priorities. Add pri=
value
to the option
field of /etc/fstab
for
use with swapon
-a.
−s
Display swap usage summary by device. Equivalent to "cat /proc/swaps". Not available before Linux 2.1.25.
−U
uuid
Use the partition that has the specified uuid
. (For this, access
to /proc/partitions
is
needed.)
−v
Be verbose.
−V
Display version
Swapoff
disables
swapping on the specified devices and files. When the
−a
flag is given, swapping
is disabled on all known swap devices and files (as found in
/proc/swaps
or /etc/fstab
).
/dev/hd??
standard paging
devices
/dev/sd??
standard (SCSI)
paging devices
/etc/fstab
ascii filesystem
description table
The swapon command appeared in 4.0BSD.
Copyright (c) 1980, 1991 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 6.3 (Berkeley) 3/16/91 Sun Dec 27 12:31:30 1992: Modified by faith@cs.unc.edu Sat Mar 6 20:46:02 1993: Modified by faith@cs.unc.edu Sat Oct 9 09:35:30 1993: Converted to man format by faith@cs.unc.edu Sat Nov 27 20:22:42 1993: Updated authorship information, faith@cs.unc.edu Mon Sep 25 14:12:38 1995: Added -v and -p information Tue Apr 30 03:32:07 1996: Added some text from A. Koppenhoefer |