apt-get packages unauthenticated

[gymsmoke]

when i run apt-get install for proftpd on my Ubuntu 5.10 server install, I get added some of the recommended packages, and then I get this after saying 'Y' to install:
WARNING: the following packages cannot be authenticated!
debconf-utils perl-modules perl libterm-readkey-perl libterm-readline-gnu-perl libterm-readline-perl-perl proftpd-common ucf proftpd proftpd-doc
Install without verification ? [y/N]

when I typed apt-get install proftpd, these were suggested/recommended packages!
why are they not able to be authenticated? and why would they be suggested/recommended if they cannot be authenticated?
and, is it safe to install them anyway?

[WildTangent]

when i run apt-get install for proftpd on my Ubuntu 5.10 server install, I get added some of the recommended packages, and then I get this after saying 'Y' to install:
WARNING: the following packages cannot be authenticated!
debconf-utils perl-modules perl libterm-readkey-perl libterm-readline-gnu-perl libterm-readline-perl-perl proftpd-common ucf proftpd proftpd-doc
Install without verification ? [y/N]

when I typed apt-get install proftpd, these were suggested/recommended packages!
why are they not able to be authenticated? and why would they be suggested/recommended if they cannot be authenticated?
and, is it safe to install them anyway?

Just means the server's GPG signature is incorrect, or missing. Proceed at your own risk.

-Wild

[gymsmoke]

Wild~
my sources.list doesn't contain anything that I would consider 'off the beaten path' ...

Would I be better served by using only the strict Ubuntu repo's ?

[aysiu]

and why would they be suggested/recommended if they cannot be authenticated?

The packages themselves are recommended. The source from which you're getting the packages is what cannot be authenticated.

and, is it safe to install them anyway?

It depends. What does your /etc/apt/sources.list look like?

[gymsmoke]

dep http://us.archive.ubuntu.com/ubuntu breezy main restricted
deb-src http://us.archive.ubunut.com/ubunut breezy main restricted

deb http://us.archive.ubuntu.com/ubuntu breezy-updates main restricted
deb-src http://us.archive.ubuntu.com/ubuntu breezy-updates main restricted

deb http://us.archive.ubuntu.com/ubuntu breezy universe
deb-src http://us.archive.ubuntu.com/ubuntu breezy universe

deb http://security.ubuntu.com/ubuntu breezy-security main restricted
deb-src http://security.ubuntu.com/ubuntu breezy-security main restricted

deb http://security.ubuntu.com/ubuntu breezy-security universe
deb-src http://security.ubuntu.com/ubuntu breezy-security universe

[aysiu]

Yeah, you're fine.

[gymsmoke]

interesting... after the installation was completed, I ran updatedb and apt-get update...
I got this warning message for all of the repo's in sources.list

W: GPG error: http://us.archive.ubuntu.com breezy Release: Could not execute /usr/bin/gpgv to verify signature (is gnupg installed ?)

answer: no...
i installed gnupg gnupg-doc and it's fine now