What command can you use to add additional swap space?

The command mkswap is used to set up a Linux swap space on a specified file or partition. Swap space is an area of the disk that is used as virtual memory, which helps manage the system's memory more effectively when physical RAM is fully utilized. By using the mkswap command, an administrator can prepare a file or a disk partition to be used as swap space.

To create or enable additional swap space on your system, you would first use mkswap to format the file or partition as swap. After this step, the configured swap space can then be activated with the swapon command. This process is essential when you want to extend the virtual memory availability and improve system performance, especially when running memory-intensive applications.

While swapoff is used to disable swap space, vmstat provides information about system processes, memory, paging, block I/O, traps, and CPU activity, which does not directly relate to adding swap space. The tee command is used to read from standard input and write to standard output and is not relevant in the context of swap space management. Therefore, mkswap is the appropriate command for initializing additional swap space in a Linux environment.