How can you determine the current disk space usage in a Linux system?

To determine the current disk space usage in Linux, the df command is usually used. It shows information about filesystems, their size, used and free space.

Example:

df -h

The -h option displays sizes in a human-readable format (KB, MB, GB).

You can also use the du command to estimate the size of specific directories or files:

du -sh /path/to/directory

where -s is for summary, -h for human-readable format.