Tried Google. There are many methods, but NONE WORKS!
milanolarry 發表於 2015-5-14 08:10
Better tell us what you've tried and what's the related output first.
Generally, these APT GPG question is quite common and could be solved either by "keyring" related package, like "debian-archive-keyring", or using "apt-key" to import the public GPG key to the system. Again, google is your friend in this regard.