How to uninstall or remove qalculate-gtk software package from Ubuntu 14.04 LTS (Trusty Tahr)

You can uninstall or removes an installed qalculate-gtk package itself from Ubuntu 14.04 LTS (Trusty Tahr) through the terminal,

$ sudo apt-get remove qalculate-gtk

Uninstall qalculate-gtk including dependent package

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

$ sudo apt-get remove --auto-remove qalculate-gtk

Use Purging qalculate-gtk

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

$ sudo apt-get purge qalculate-gtk

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 qalculate-gtk