$ sudo apt-get remove libktpotr9 

Uninstall libktpotr9 including dependent package

If you would like to remove libktpotr9 and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove libktpotr9 

Use Purging libktpotr9

If you use with purge options to libktpotr9 package all the configuration and dependent packages will be removed.

$ sudo apt-get purge libktpotr9 

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 libktpotr9 

See Also,