How to view disk usage on a server and how much space a specific folder occupies?

To view disk usage on a Linux server, the df command is usually used:

df -h

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

To find out how much space a specific folder occupies, use the du command:

du -sh /path/to/folder

The -s option summarizes the total size, and -h makes the output human-readable.

If you want to see the size of all nested folders inside, you can run:

du -h --max-depth=1 /path/to/folder

This will show the size of each first-level folder within the specified directory.