GNU/Linux Elementary OS Updating System Guide
How to Update Packages & System on Elementary OS LTS GNU/Linux desktop – Step by step Tutorial.
And here I explain How to Update/Upgrade Linux Elementary OS easily on Command Line.
You may also be interested in learning How to Update/Upgrade Kernel.
Especially relevant: after if the suited result is Not achieved, you may be also interested about How to Upgrade Kernel on Elementary OS.
 
- 1. Terminal QuickStart- How to QuickStart with Command Line on Elementary OS: - First Update the Apt Repo Sources with: - sudo apt update 
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