swapon

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swapon/swapoff enable/disable devices and files for paging and swapping and it is included on the mount package.


swapon --show
NAME      TYPE      SIZE   USED PRIO
/dev/dm-2 partition 976M 974.8M   -2
swapon --show
(No output if not swap active)
 swapon  -s
 Filename				Type		Size	Used	Priority
 /swap.img                              	file    	2023420	104312	-2


 Oct 12 12:55:03 SERVER swapon[449]: swapon: /swap.img: swapon failed: Read-only file system

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