How to Fix the pacman DB LOCK error.
This error can happen when you interrupt pacman during an update process. It creates a lock file and isn't able to delete it due to the interruption.
This video shows you how to fix it and get going again.
Delete lock file with command: sudo rm /var/lib/pacman/db.lck
Update pacman DB with command: sudo pacman -Syy
Upgrade system with command: sudo pacman -Su
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