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# Linux swapon Command [ Linux Command Manual](#) The Linux swapon command is used to activate swap space in a Linux system. The memory management of a Linux system must use swap space to establish virtual memory. ### Syntax /sbin/swapon -a /sbin/swapon specialfile .../sbin/swapon **Parameter Description:** * -h Please help me * -V Display version information * -s Display short device information * -a Automatically enable all SWAP devices * -p Set priority, you can choose a number between 0 and 32767. Or add pri= ( is a number between 0 and 32767) in /etc/fstab, then you can conveniently use swapon -a to enable them, and they will have the priority setting. swapon is for enabling swap. Conversely, there is a command to disable swap, swapoff. [ Linux Command Manual](#)