$ sudo apt-get remove aghermann 

Uninstall aghermann including dependent package

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

$ sudo apt-get remove --auto-remove aghermann 

Use Purging aghermann

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

$ sudo apt-get purge aghermann 

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 aghermann 

See Also,