Lorsque j'essaie d'installer ou de mettre à jour des packages, j'obtiens:
Untrusted packages could compromise your system's security.
You should only proceed with the installation if you are certain that
this is what you want to do.
Je soupçonne fortement que cela est lié à l'erreur que j'obtiens lors de la mise à jour:
$ sudo aptitude update
Get: 1 http://ftp.us.debian.org wheezy InRelease [208 kB]
Get: 2 http://debian.lcs.mit.edu wheezy InRelease [208 kB]
Ign http://ftp.us.debian.org wheezy InRelease
Hit http://ftp.us.debian.org wheezy/main amd64 Packages/DiffIndex
Hit http://ftp.us.debian.org wheezy/contrib amd64 Packages/DiffIndex
Hit http://ftp.us.debian.org wheezy/non-free amd64 Packages/DiffIndex
Hit http://ftp.us.debian.org wheezy/contrib Translation-en
Hit http://ftp.us.debian.org wheezy/main Translation-en
Hit http://ftp.us.debian.org wheezy/non-free Translation-en
Get: 3 http://debian.lcs.mit.edu wheezy-updates InRelease [116 kB]
Ign http://debian.lcs.mit.edu wheezy InRelease
Ign http://debian.lcs.mit.edu wheezy-updates InRelease
Hit http://debian.lcs.mit.edu wheezy/main Sources/DiffIndex
Hit http://debian.lcs.mit.edu wheezy/main amd64 Packages/DiffIndex
Hit http://debian.lcs.mit.edu wheezy/main Translation-en
Ign http://ftp.us.debian.org wheezy/contrib Translation-en_US
Ign http://debian.lcs.mit.edu wheezy-updates/main Sources/DiffIndex
Ign http://debian.lcs.mit.edu wheezy-updates/main amd64 Packages/DiffIndex
Ign http://ftp.us.debian.org wheezy/main Translation-en_US
Ign http://ftp.us.debian.org wheezy/non-free Translation-en_US
Hit http://debian.lcs.mit.edu wheezy-updates/main Sources
Hit http://debian.lcs.mit.edu wheezy-updates/main amd64 Packages
Ign http://debian.lcs.mit.edu wheezy/main Translation-en_US
Ign http://debian.lcs.mit.edu wheezy-updates/main Translation-en_US
Ign http://debian.lcs.mit.edu wheezy-updates/main Translation-en
Fetched 531 kB in 1s (304 kB/s)
W: GPG error: http://ftp.us.debian.org wheezy InRelease: Unknown error executing gpgv
W: GPG error: http://debian.lcs.mit.edu wheezy InRelease: Unknown error executing gpgv
W: GPG error: http://debian.lcs.mit.edu wheezy-updates InRelease: Unknown error executing gpgv
J'ai essayé de réinstaller le porte-clés:
sudo aptitude reinstall debian-archive-keyring
(ce qui, étonnamment, ne provoque pas d'avertissement).