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