The date Command

Duh, you type “date” and you get the date and time.  However...


The ls Command

By default, ls lists names of every non-hidden item in the directory.


Who are we or who's on the system?


Do you hear an echo?

The echo command is very important in scripts and become real essential.  You can use the command to:

The (pound sign) denotes a comment follows. This is also important in scripts.


The wc Command

The wc command is useful for counting lines, words, bytes and characters. This is very useful for knowing things like how many people you may have in your etc/passwd file or how many files you have in a directory, etc.