I am in the process of recompiling the kernel on Debian. Following the instructions on kernel.org, the first step is to verify the signature. But GPG complains that it cannot find the public key:

# gpg --verify linux-3.12.22.tar.sign 
gpg: Signature made Wed 11 Jun 2014 17:22:35 CEST using RSA key ID 6092693E
gpg: Can't check signature: public key not found

I have tried to fetch the key:

# gpg --recv-keys 6092693E
gpg: no keyserver known (use option --keyserver)
gpg: keyserver receive failed: bad URI

I have tried to set the keyserver:

# gpg --keyserver subkeys.pgp.net --recv-keys 6092693E
gpg: requesting key 6092693E from hkp server subkeys.pgp.net
gpg: keyserver timed out
gpg: keyserver receive failed: keyserver error

What is the problem? Thanks.


  • Debian GNU/Linux 6

  • GPG 1.4.10

EDIT: I do have a firewall, but its rules don't block outbound traffic. However, connecting to the keyserver on a different port:

$ gpg --keyserver subkeys.pgp.net:80 --recv-keys 6092693E
gpg: requesting key 6092693E from subkeys.pgp.net:80
gpgkeys: no keyserver host provided
gpg: keyserver internal error
gpg: keyserver receive failed: keyserver error

1 Answer 1


As error message, you haven't configured gpg server.

Try this:

gpg --keyserver subkeys.pgp.net --recv-keys 6092693E && gpg --export --armor 6092693E \
| sudo apt-key add -


It seems that you can not connect to server:

gpg: keyserver timed out

Do you have a firewall block port 11371 of hkp service.

You can use port 80 instead of 17371:

gpg --keyserver subkeys.pgp.net:80 --recv-keys 6092693E
  • Thanks, but I would rather not run a command that I don't understand. How is supposed the second call to gpg to run if the first command in the chain fails? gpg --export --armor 6092693E alone does print a key that can be passed to apt-key add but how does gpg get it, while --recv-keys fails to fetch it?
    – Eleno
    Jun 22, 2014 at 10:43
  • @Elena: updated my answer.
    – cuonglm
    Jun 22, 2014 at 11:00

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