Working With Alias

In Linux, we are provided with a cool tool that can create new shortened command for a  given command. It is called alias. That is, it allows a user to create simple names or abbreviations (even consisting of just a single character) for commands regardless of how complex the original commands are and then use them in the same way that ordinary commands are used. The alias command is built into a number of shells including ash, bash (the default shell on most Linux systems), csh and ksh.To create alias type the command:

#alias  

Eg.#alias dir="ls"