How to Recover Ubuntu 20.04 Without Internet Connection

Fixing System

3. 2. Fixing Automatically

   And Execute the Commands:

   sudo su -c "apt-get update"

   sudo su -c "dpkg --configure -a"

   sudo su -c "apt-get -f install"

   Last, if needed you can try using the more powerful Aptitude Package Manager.
   So run:

   sudo aptitude upgrade

   In case that you Do Not dispose of aptitude on your System, then possibly Download the .deb Package and Install it with:

   sudo dpkg -i ~/Downloads/aptitude*.deb

4. 3. Checking Up Disk

   Then you have to Make Sure that the Hard Drive isn’t Corrupted.

   If Ubuntu Non Bootable Go to Next Step!

   1. Make sure that All the Drives on /etc/fstab are Connected
   2. Reboot Ubuntu
   3. On Grub Boot Splash Screen Select “Advanced Options”
   4. Then “Boot in Recovery Mode“
   5. Select “Repair Broken Packages”
   6. Look at the Output of the Drivers Check-Up Containing “blocks”
      If No Errors are Shown then your Hard Drive should be still Healty…
   7. If the Issue is still Not Solved then Look to the Next Step

5. 4. Fixing Disk Errors

   How to Fix Disk Errors Even if Ubuntu Non Bootable

   Restoring Ubuntu Disk Guide

   Repairing Ubuntu Disk