How to do it...

These are the operations you can perform on aliases:

1. Create an alias:

        $ alias new_command='command sequence'

This example creates a shortcut for the apt-get install command:

        $ alias install='sudo apt-get install'

Once the alias is defined, we can type install instead of sudo apt-get install.

1. The alias command is temporary: aliases exist until we close the current terminal. To make an alias available to all shells, add this statement to the ~/.bashrc file. Commands in ~/.bashrc are always executed when a new interactive shell process is spawned:

        $ echo 'alias cmd="command seq"' >> ~/.bashrc

1. To remove an alias, remove its entry from ~/.bashrc (if any) or use the unalias command. Alternatively, alias example= should unset the alias named example.
2. This example creates an alias for rm that will delete the original and keep a copy in a backup directory:

        alias rm='cp $@ ~/backup && rm $@'