Sometimes when you have a bad electricity in your company/place where you live, your computer may lose some files when blackout happened. Sometimes icons are missing or some program just stopped working. To solve this issue you may reinstall your Linux distribution or alternatively you can just reinstall whole package. In
ArchLinux you can type
this command to reinstall all native package:
pacman -Qnq | sudo pacman -S -
In
Ubuntu, you can type
this command to find for corrupted and missing files on installed package:
sudo apt-get install --reinstall $(sudo dpkg -S $(sudo debsums -c 2>&1 | cut -d " " -f 4 | sort -u) | cut -d : -f 1 | sort -u)
Or if you want to reinstall whole package, you can follow the commands on this
link. Your Linux installation now should work correctly.
