好吧，我正在尝试升级（如果你可以这么称呼的话）到 lenny-backports，如下所示这里，但是我在运行时遇到了这个错误apt-get update：
W: GPG error: http://backports.debian.org 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
我添加到 sources.list 的行如下：
deb http://backports.debian.org/debian-backports lenny-backports main
正如 Womble 在上一个问题中问到的那样，这里是 debian-archive-keyring 的版本，无论它是什么......
dpkg -l debian-archive-keyring
Desired=Unknown/Install/Remove/Purge/Hold
| 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
答案1
您的 debian-archive-keyring 软件包版本已过期。您需要将其升级到 lenny 中可用的最新版本 — 应该apt-get install debian-archive-keyring可以解决问题。
答案2
尝试这个
gpg --keyserver hkp://subkeys.pgp.net --recv-keys 16BA136C
gpg --export 16BA136C | apt-key add -