Install Ubuntu Updates via CLI
sudo apt-get update sudo apt-get upgrade sudo apt-get dist-upgradeUpdate command fetches the package index files. Upgrade actually installs the new packages. And, dist-upgrade handles changes in dependences and can remove some packages if necessary.
Be that as it may, this is definitely far from user-friendly approach. There should be a one line command that deals all of this “intelligently”, and when necessary, more apt user can explicitly provide arguments to control the flows manually. But until then, you will be running with 3 lines of commands every time.