For some experiments you will need to use the Terminal Window. To get a Terminal Window click on the program in the Favorites section of the Activities panel. 

Some useful commands are

• pwd – To Print the Working Directory; i.e. the folder you’re “in”.
• cd directory-name – Change Directory. Note that cd by itself goes to your home directory, and cd .. goes up the directory tree.
• ls – LiSt the files in the current directory. Use ls -l to get more information about the files
• cp old-file new-file – CoPy a file.
• more textfilename – shows you the contents of the text file.
• wc textfilename – shows you a WordCount of the text file as well as how many characters and lines it has.
• man command – shows you the command’s MANual page. For example, typing man ls tells you all about the ls command.

Note that you can drop icons into the Terminal Window – the name of the file or folder you drop is pasted on the command line.