swapoff

The "swapoff" command is a command line tool available in Linux systems that allows users to disable or turn off the swap space. Swap space is a dedicated area on a hard drive that acts as virtual memory when the physical memory (RAM) is insufficient.

When the "swapoff" command is executed with appropriate privileges, it unmounts and deactivates the swap space, making it unavailable for use. The command takes one argument, which is typically the device file associated with the swap space.

Disabling swap space can be useful in certain scenarios such as optimizing system performance, troubleshooting memory-related issues, or reducing wear on SSDs that may be acting as swap devices.

It is worth noting that the "swapoff" command should be used with caution. Disabling swap space without proper consideration of system resource limitations can result in system instability or crashing when the system runs out of available memory.

To enable the swap space again, the "swapon" command is used, with the corresponding device file as an argument. This command activates the swap space and makes it available for use by the operating system and applications.