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Alright, so I'm trying to upgrade (if you could call it so) to lenny-backports as seen here, but I ran into this error when running apt-get update:

W: GPG error: lenny-backports Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A*numbers and letters*A
W: You may want to run apt-get update to correct these problems

The line I added to sources.list is as follows:

deb lenny-backports main

And as Womble asked in previous question here is the version of debian-archive-keyring no matter what is that..

dpkg -l debian-archive-keyring
| Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name                       Version                    Description
ii  debian-archive-keyring     2009.01.31                 GnuPG archive keys of the Debian archive
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up vote 3 down vote accepted

Your version of the debian-archive-keyring package is out of date. You need to upgrade it to the latest version available in lenny -- an apt-get install debian-archive-keyring should do the trick.

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Yup, that fixed the GPG error. Thanks! – Rihards Jul 5 '11 at 15:36

try this

gpg --keyserver hkp:// --recv-keys 16BA136C
gpg --export 16BA136C | apt-key add -
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Should I use my key instead of 16BA136C ? – Rihards Jul 5 '11 at 14:52
no use that key – Mike Jul 5 '11 at 14:56
Eeeew... manual key import ftl. – womble Jul 5 '11 at 14:57
you really should use the packages, not manual key import. go with @womble's answer – Michael Lowman Jul 5 '11 at 15:00

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