Knowing how to check free disk space on a Linux system is an important system administration task. The df command, which stands for disk free, is used to display the amount of disk space that is available on a particular file system. This information can be useful for determining how much space is left on a system, or for identifying which file systems are running low on space.
The df command can be used with a variety of options to display different types of information. The following are some of the most commonly used options: