W: GPG error: http://software.virtualmin.com virtualmin-etch Release: The following s ignatures couldn’t be verified because the public key is not available: NO_PUBKEY
do you knwo what that is
is that virtualmins fault or mine 
regards
It’s my fault. I’m in the middle of overhauling the Debian/Ubuntu repositories to get them working with signatures…and the documentation sucks so bad it makes me want to kick someone. I’m hoping to have it fixed today.
Sorry for the inconvenience. Blame the idiots who wrote the repository documentation for secure apt (and I guess you can blame me, too, if you really want to).
have you submitted your gpg key on gpg keyserver?
Nope. But that’s a good idea. Will do so today.