Whenever you are using terminal on Unix, Linux and MacOs and need to check the amount of space used by a folder or files, you can use the `du` command:
// basic use. Gives the size in bytes of all files and folders in the folder you are in
du
// gives the size in "human readable" units like kilobytes, megabytes, gigabytes of all files and folders.
du -h
// gives an one line summary of the space occupied by all files and folders
du -s
// combines human readable and summary options
du -hs
