Many a times, we need to know list of installed packages on Ubuntu. We will achieve required task by using apt command. apt is a command-line interface which allows actions such as installing new software packages, removing unnecessary software packages, it can be used for updating the existing software packages as well as searching for specific software packages etc.
sudo apt list --installed
This output might overwhelm you, if you want to check if specific package is installed, you can check this by following command
sudo apt list --installed | grep -i google
If you want to remove any application, use following commaand
sudo apt-get remove <application_name>
Sometimes applications is split up into multiple packages. In such cases, to uninstall all related packages and configurations, use following command
sudo apt-get purge <application_name>