How to uninstall or remove firmware-realtek software package from Debian 7 (Wheezy)

You can uninstall or removes an installed firmware-realtek package itself from Debian 7 (Wheezy) through the terminal,

$ sudo apt-get remove firmware-realtek

Uninstall firmware-realtek including dependent package

If you would like to remove firmware-realtek and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove firmware-realtek

Use Purging firmware-realtek

If you use with purge options to firmware-realtek package all the configuration and dependent packages will be removed.

$ sudo apt-get purge firmware-realtek

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove firmware-realtek