$ sudo apt-get remove fatrat-unpack 

Uninstall fatrat-unpack including dependent package

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

$ sudo apt-get remove --auto-remove fatrat-unpack 

Use Purging fatrat-unpack

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

$ sudo apt-get purge fatrat-unpack 

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 fatrat-unpack 

See Also,