swapon(8) [bsd man page]

SWAPON(8)						      System Manager's Manual							 SWAPON(8)

NAME

       swapon - specify additional device for paging and swapping

SYNOPSIS

       swapon -a
       swapon name ...

DESCRIPTION

       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 swapon normally occur in the system multi-user initial-
       ization file /etc/rc making all swap devices available, so that the paging and swapping activity is interleaved across several devices.

       Normally, the -a argument is given, causing all devices marked as ``sw'' swap devices in /etc/fstab to be made available.

       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.

SEE ALSO

       swapon(2), init(8)

FILES

       /dev/[ru][pk]?b	   normal paging devices

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  dur-
       ing system operation.

       swapon is not implemented in 2.11BSD.

4th Berkeley Distribution					 November 17, 1996							 SWAPON(8)

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

NAME

       swapon, swapoff - enable/disable devices and files for paging and swapping

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. Equivalent to "cat /proc/swaps".  Not available before Linux 2.1.25.

       -a     All  devices marked as ``swap'' 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.  When the -a flag is given, swapping is disabled on all  known  swap  devices
       and files (as found in /proc/swaps or /etc/fstab).

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)