I'm trying to do a full system upgrade using pacman -Syu. It says:
:: File /var/cache/pacman/pkg/turbulence-0.3.5-1-any.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n]
Is there a way to fix this?
There are tons of topics out there that say you should edit the pacman.config file and remove the PGP key checks entirely but it's not a good idea.
simply run this command and wait for refreshing your keys by downloading them from the servers:
$ sudo pacman-key --refresh-keys
and then proceed with you full system upgrade sudo pacman -Syu