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SWAPON(8)		   Linux Programmer's Manual		     SWAPON(8)

NAME
       swapon, swapoff - enable/disable	devices	and files for paging and swap-
       ping

SYNOPSIS
       /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 ...

DESCRIPTION
       Swapon is used to specify devices on which paging and swapping  are  to
       take  place.   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:

       -h     Provide help

       -V     Display version

       -s     Display swap usage summary  by  device.	This  option  is  only
	      available	 if  /proc/swaps  exists  (probably  not before	kernel
	      2.1.25).

       -a     All devices marked as ``sw'' swap	devices	in /etc/fstab are made
	      available. 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.

       -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. 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.

       Swapoff disables	swapping on the	specified devices and files, or	on all
       swap entries in /etc/fstab when the -a flag is given.

NOTE
       You should not use swapon on a file with	holes.	Swap over NFS may  not
       work.

SEE ALSO
       swapon(2), swapoff(2), fstab(5),	init(8), mkswap(8), rc(8), mount(8)

FILES
       /dev/hd??  standard paging devices
       /dev/sd??  standard (SCSI) paging devices
       /etc/fstab ascii	filesystem description table

HISTORY
       The swapon command appeared in 4.0BSD.

Linux 1.x		       25 September 1995		     SWAPON(8)

NAME | SYNOPSIS | DESCRIPTION | NOTE | SEE ALSO | FILES | HISTORY

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