System administration command. Make the listed devices available for swapping and paging.
Consult /etc/fstab for devices marked sw. Use those in place of the devices argument.
Used with -a. Don’t complain about missing devices.
Print help message, then exit.
Specify a priority for the swap area. Higher priority areas will be used up before lower priority areas are used.
Print swap usage summaries, then exit.
Print version information, then exit.