Helpful UNIX Commands
Change Directory   cd  <directory name>
e.g.  cd  MYDOC (change to directory MYDOC)
        cd                   (change to the home directory)
             cd  ..              (change to the parent directory)
List content of current directory          ls
     e.g.   ls MYDOC
 Display current working directory      pwd
 Make a new directory        mkdir <directory name>
 Delete a directory    rmdir <directory name>