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Normally the Debian software distribution and upgrade process is
fantastic. An occasional aptitude update; aptitude
dist-upgrade and my systems are all up to date. But Debian
updates keys once a year and their key distribution process is not
entirely smooth. The end result is an error like one of these
 
aptitude — debian WARNING: untrusted versions of the following packages will be
installed
You can just ignore these errors, upgrade anyway, and hope for the
best. But a better solution is to manually install the 2006 key first,
then re-run the update. apt-get — The following packages cannot be authenticated 
wget http://ftp-master.debian.org/ziyi_key_2006.ascI'm still not sure how to verify you really got the
right 2006 key, I decided to chance it. Now would be the perfect time
to h4x0r ftp-master.debian.org. shudder. apt-key add ziyi_key_2006.asc aptitude update aptitude dist-upgrade 
 There's background info on the Debian Wiki. | ||