NAME

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

SYNOPSIS

       /sbin/swapon [-h -V]
       /sbin/swapon -a [-v]
       /sbin/swapon [-v] [-p priority]  specialfile ...
       /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
       -a     All  devices  marked  as  ``sw''  swap  devices  in
              /etc/fstab are made available.
       -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.

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.

AUTHORS

       See  the  Linux  mount(8)  man  page for a complete author
       list.  Primary contributors include Doug Quale, H. J.  Lu,
       Rick Sladkey, and Stephen Tweedie.