Mandrake/Mandriva應該要把他的key也裝進來
rpm –import /etc/RPM-GPG-KEYS/*.asc
如果有plf的話，
ref: http://www.mandrake.tips.4.free.fr/configuration92.html
To avoid getting some warning of a missing signature for the PLF
packages, I did:
links -source http://plf.zarb.org/plf.asc | gpg --import
but you can also choose to ignore missing signatures.