$ sudo apt-get remove mana-dbg 

Uninstall mana-dbg including dependent package

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

$ sudo apt-get remove --auto-remove mana-dbg 

Use Purging mana-dbg

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

$ sudo apt-get purge mana-dbg 

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 mana-dbg 

See Also,