swapon

Enable devices and files for swapping. Note: path/to/file can either point to a regular file or a swap partition. More information: https://manned.org/swapon.

• Show swap information:

swapon

• Enable a given swap area:

swapon path/to/file

• Enable all swap areas specified in /etc/fstab except those with the noauto option:

swapon --all

• Enable a swap partition by its label:

swapon -L label