I had a need to do some work on an old Debian server last week and hit an error message running ‘apt-get update’. It returned the following error message:
GPG error: ftp://ftp.debian.org/etch Release:
The following signatures couldn’t be verified because the public key is not available:
NO_PUBKEY 9AA38DCD55BE302B
There is no public key available for the following key IDs:
9AA38DCD55BE302B
The problem is caused by Debian now attempting to verify the authenticity of the servers for updating. The solution is to run the following two commands:
gpg – -keyserver pgpkeys.mit.edu – -recv-key 9AA38DCD55BE302B
gpg -a – -export 9AA38DCD55BE302B | sudo apt-key add -
Running an ‘apt-get update’ should now work OK.
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