$ sudo apt-get remove galera3

Uninstall galera3 including dependent package

If you would like to remove galera3 and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove galera3

Use Purging galera3

If you use with purge options to galera3 package all the configuration and dependent packages will be removed.

$ sudo apt-get purge galera3

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 galera3

See Also,