Find Disk Usage in Linux

du command shows disk usage.

du -h --max-depth=1

If you want to sort the result, see How to sort the result of du -h command

To see disk usage on the current partition only, run

du -hx --max-depth=1

To sort by disk space

du -k --max-depth=1 | sort -n

To display the top 20 largest folders/files

du -ahx . | sort -rh | head -20
du -h | sort -hr | head -n  30