Monitoring disk space is crucial for the smooth operation of any Unix system. It can become full without warning, leading to a range of issues, from performance degradation and application failures to data loss. Fortunately, there are several commands that can be used to check disk space in Unix.
The df command is one of the most commonly used. It provides a summary of the disk usage for all mounted file systems. The output of the df command includes the amount of total space, used space, and available space for each file system.