swapon from util-linux 2.27.1

Usage: swapon [options] [<spec>] Enable devices and files for paging and swapping. Options: -a, --all enable all swaps from /etc/fstab -d, --discard[=<policy>] enable swap discards, if supported by device -e, --ifexists silently skip devices that do not exist -f, --fixpgsz reinitialize the swap space if necessary -o, --options <list> comma-separated list of swap options -p, --priority <prio> specify the priority of the swap device -s, --summary display summary about used swap devices (DEPRECATED) --show[=<columns>] display summary in definable table --noheadings don't print table heading (with --show) --raw use the raw output format (with --show) --bytes display swap size in bytes in --show output -v, --verbose verbose mode -h, --help display this help and exit -V, --version output version information and exit The <spec> parameter: -L <label> synonym for LABEL=<label> -U <uuid> synonym for UUID=<uuid> LABEL=<label> specifies device by swap area label UUID=<uuid> specifies device by swap area UUID PARTLABEL=<label> specifies device by partition label PARTUUID=<uuid> specifies device by partition UUID <device> name of device to be used <file> name of file to be used Available discard policy types (for --discard): once : only single-time area discards are issued pages : freed pages are discarded before they are reused If no policy is selected, both discard types are enabled (default). Available columns (for --show): NAME device file or partition path TYPE type of the device SIZE size of the swap area USED bytes in use PRIO swap priority UUID swap uuid LABEL swap label For more details see swapon(8).