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 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:
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).
You should not use swapon on a file with holes. Swap over NFS may not work.
swapon(2) , swapoff(2) , fstab(5) , init(8) , mkswap(8) , rc(8) , mount(8)
/dev/hd?? standard paging devices
/dev/sd?? standard (SCSI) paging devices /etc/fstab ascii filesystem description table
The swapon command appeared in 4.0BSD.
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