swapon

       ping

SYNOPSIS
       /sbin/swapon -a [-e] [-v]
       /sbin/swapon [-p priority] [-v] specialfile...
       /sbin/swapon -s
       /sbin/swapon -h | -V
       /sbin/swapoff -a [-v]
       /sbin/swapoff [-v] specialfile...
       /sbin/swapoff -h | -V

DESCRIPTION
       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'' in /etc/fstab are made available,
              except for those with the ``noauto'' option.  Devices  that  are
              already being used as swap are silently skipped.

       -e     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 the priority of the swap device.  This  option  is  only
              available  if  swapon  was compiled 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.


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.

AVAILABILITY
       The swapon command is part of the util-linux-ng package and  is  avail-
       able from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.



Linux 1.x                      25 September 1995                     SWAPON(8)