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So you want to improve your knowledge of Unix but you don't have access to a Unix system. Never fear, the very nice people at www.arbornet.org provide free Shell Accounts. It only takes about 5 minutes to get logged in and set up.
Follow my article "Practice your Unix skills with a free shell account", in the Basic Unix Commands section or click here. This should get you up and running in about 5 minutes. Enjoy.
The best way to improve your Unix skills is to practice. Don't worry if you don't have Unix at home, you can still practice with a free shell account. Here's how ...
The touch command creates an empty file.
The echo command prints the command line argument to stdout (the standard output file) which is usually your terminal screen.
cat is short for catenate, which means to connect in a series of links or chains. cat displays the contents of a file and can also create a file.
The clear command clears the screen. This is a useful little command which does exactly what you might expect, it clears the screen of content.
The ls command lists files and directories. Use ls without arguments and you will get a simple listing in alphabetical order of files and directories. Use ls with arguments will display more information, depending on the arguments used.