tldr/pages/linux/mkswap.md

mkswap

Set up a Linux swap area on a device or in a file. Note: path/to/file can either point to a regular file or a swap partition. More information: https://manned.org/mkswap.

• Set up a given swap area:

sudo mkswap {{path/to/file}}

• Check a partition for bad blocks before creating the swap area:

sudo mkswap {{[-c|--check]}} {{path/to/file}}

• Specify a label for the partition (to allow swapon to use the label):

sudo mkswap {{[-L|--label]}} {{label}} {{/dev/sdXY}}

• Use the specified UUID:

sudo mkswap {{[-U|--uuid]}} {{clear|random|time|UUID_value}}

• Set up a swap file (for btrfs, see tldr btrfs filesystem instead):

sudo mkswap {{[-s|--size]}} {{file_size}} {{[-F|--file]}} {{path/to/swapfile}}