1. To find large files on Linux, use this command: sudo du -aBm / 2>/dev/null | sort -nr | head -n 10.
  2. To find the largest files in a directory, use: du -ah /directory/name | sort -rn | head -n 10.
  3. To find all files over 500 MB, use: sudo find / -type f -size +500M -ls.