$ sudo apt-get remove libzinnia0 

Uninstall libzinnia0 including dependent package

If you would like to remove libzinnia0 and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove libzinnia0 

Use Purging libzinnia0

If you use with purge options to libzinnia0 package all the configuration and dependent packages will be removed.

$ sudo apt-get purge libzinnia0 

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 libzinnia0 

See Also,