$ sudo apt-get remove knutclient 

Uninstall knutclient including dependent package

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

$ sudo apt-get remove --auto-remove knutclient 

Use Purging knutclient

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

$ sudo apt-get purge knutclient 

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 knutclient 

See Also,