[Debian] Apt-get : NO_PUBKEY / GPG error
When updating the Debian based system, it may happens that the apt-get displays an error message like:
W: GPG error: ftp://ftp.debian.org/ testing Release:
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 010908312D230C5F
W: There is no public key available for the following key IDs:
010908312D230C5F
This is a new feature of the apt-get system that guarantee the authenticity of servers for updating Debian.
Solution:
Simply type the following commands, taking care to replace the number of the key that displayed in the error message:
gpg --keyserver pgpkeys.mit.edu --recv-key 010908312D230C5F
gpg -a --export 010908312D230C5F | sudo apt-key add -