What information does the 'df' command provide?

The 'df' command is primarily used to display the amount of disk space used and available on file systems. Specifically, it provides a summary that includes information about total disk space, used space, available space, and the percentage of space used for each mounted file system. This command is very useful for system administrators to monitor disk space usage and ensure that there is sufficient space available for operations.

The other options pertain to different aspects of system information: memory usage statistics are handled by commands like 'free' or 'vmstat'; network interfaces can be viewed using 'ifconfig' or 'ip'; and file permissions are displayed using the 'ls -l' command. Each of these utilities serves a distinct purpose, further illustrating the specialized nature of the 'df' command in reporting disk space usage.