In the context of Linux memory management, what does swapoff do?

The command swapoff is used in Linux to disable or disengage a swap partition or file. When executed, it immediately stops the kernel from using the specified swap area, effectively removing it from the system's virtual memory management. This is particularly useful when you want to free up swap space for system maintenance or when you're moving swap partitions around.

While options like activating swap space or optimizing memory might seem relevant, they describe the function of the swap on or swapon command, which enables or activates swap space for use. Increasing RAM size is not related to swapoff, as RAM size pertains to the physical memory installed on the machine and cannot be changed through software commands. Thus, disengaging a swap partition accurately captures the function of swapoff.