Fix Ubuntu 16.04 Broken Packages
The tutorial shows you step-by-step How to Ubuntu 16.04 Fix Broken Packages.
Especially relevant: this Ubuntu 16.04 Fix Broken Packages Workflow is Working also in Case of an “input/output”, “fatal error” and error (2) Issues!
And this an Ultimate Procedure to follow for successfully Recovering your Ubuntu System from a severe Issue.

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As First, Aid Try a Simple Reparation of Ubuntu 16.04.
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First, Open a Shell session
Ctrl+Alt+t on desktopIn case first see: Terminal QuickStart Guide.
- And Execute the Commands:
sudo su -c "apt-get update"
sudo su -c "dpkg --configure -a"
sudo su -c "apt-get -f install"
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How to Manually Repair an Ubuntu Broken System
The Linked Guide shows you Step-by-Step How to Manually Fix Ubuntu 16.04 Broken Packages.