== Disk Usage ==
Show the overall disk usage
  # df
To find out how much space a given directory is used
  # du -s
This will output the usage of each partition in the server
  # df -h
To list the size of a specific directory, run the following command:
  # du -sh /home/
If you want to list all the subdirectory sizes under /home, run the following command:
  # du -sh /home/*