$ sudo apt-get remove libcplui20 

Uninstall libcplui20 including dependent package

If you would like to remove libcplui20 and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove libcplui20 

Use Purging libcplui20

If you use with purge options to libcplui20 package all the configuration and dependent packages will be removed.

$ sudo apt-get purge libcplui20 

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 libcplui20 

See Also,