In Linux systems, you can use the free command to get a detailed report on the system’s memory usage. The free command provides information about the total amount of the physical and swap memory, as well as the free and used memory.

What is the use of free command?

In LINUX, there exists a command line utility for this and that is free command which displays the total amount of free space available along with the amount of memory used and swap memory in the system, and also the buffers used by the kernel. This is pretty much what free command does for you.

What does the free command display?

The free command is a very simple command which simply shows few lines about the memory. The free command can be used to show total memory, used memory, free memory, shared memory, and available memory about RAM and swap space.