Essential Unix Commands

The manual for every unix command can be accessed by typing
'man command_name' Redirection is allowed between all commands. e.g. 'ls -al | more' allows you to page through the directory listing

Wildcards are also very useful:

The character '*' is as a wildcard for any sequence of characters, including periods or no characters at all.
The character '?' is a wildcard for a single character

e.g. 'cat new*' will type the files 'new', 'news', and 'newspaper', while 'cat new?' would only type the file 'news'.