how to repair linux system

Make a USB LiveCD boot disk, start the Ubuntu system in the boot disk, and then follow these steps:

Back up your important data on external storage to prevent this After the method fails, important data is lost.

Enter the following commands in sequence:

sudo rm /var/lib/apt/lists/lock
sudo rm /var/lib/dpkg/lock
sudo rm /var/lib/dpkg/lock-frontend
sudo dpkg --configure -a
sudo apt clean
sudo apt-get update --fix-missing
sudo apt install -f
sudo dpkg --configure -a
sudo apt-get upgrade

Then use the sudo reboot command to restart.

Recommended learning: linux tutorial

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