free

Display amount of free and used memory in the system

Overview

Displays the total amount of free and used physical and swap memory in the system, as well as the buffers and caches used by the kernel.

free [OPTIONS]

$ free -h

Display memory usage in human-readable format.

Output the last part of files

Print the groups a user is in

Print real and effective user and group IDs

Report file system disk space usage

Estimate file space usage

Print or set the system date and time

memoryramswapfreeusedsystemresources