Fix for pacman corrupted package error

So at times, especially if you haven’t been updating on a daily basis (naughty), when you update using the good ol’ sudo pacman -Syu, you will eventually be faced with this error:

error: failed to commit transaction (invalid or corrupted package)
Errors occurred, no packages were upgraded.

In times like this what one must do is to update the archlinux-keyring package first and then update the other packages. So you do

sudo pacman -Sy archlinux-keyring

and then do the usual sudo pacman -Syu, and all your problems would be solved.

Cheers.