Fix invalid PGP signature on Arch Linux install

Recently I had an issue when I was trying to install Arch Linux onto a server, where pacman would refuse to finish due to a package named libcap being "corrupted". The exact error was:

Fortunately, the fix was really easy, all you have to do is this:


 * Go into the terminal and type the following commands:
 * pacman -Syy
 * pacman -S archlinux-keyring

Then run pacman again. Afterwards, the error will be fixed!