How to Update Ubuntu From the Command Line: APT vs Ubuntu Software Updater for System Updates
Use APT from the command line when you want controlled, repeatable Ubuntu updates; use Ubuntu Software Updater when you want a safer visual prompt and do not need fine control. Ubuntu LTS releases receive five years of standard support for the main repository, while interim releases usually receive nine months, so regular updates are not optional housekeeping; they are basic system maintenance [source: Ubuntu].