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Possible Duplicate:
How do I fix the GPG error “NO_PUBKEY”?

after sudo apt-get update I get this error:

W: GPG error: http://archive.hivemind.me all Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3C962022012520A0

marked as duplicate by Jorge Castro, user76204, fossfreedom Dec 10 '12 at 17:38

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  • Hi! I tried, but no success, look: .... $sudo apt-key adv --keyserver archive.hivemind.me --recv-keys 3C962022012520A0 Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /etc/apt/secring.gpg --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver archive.hivemind.me --recv-keys 3C962022012520A0 gpg: requesting key 012520A0 from hkp server archive.hivemind.me ?: archive.hivemind.me: Connection refused gpgkeys: HTTP fetch error 7: couldn't connect: Connection refused gpg: no valid Open – Oleksa Feb 16 '11 at 14:30
  • The website appears to be either down or misconfigured, I can't get to it either. – Jorge Castro Feb 16 '11 at 14:30
  • You can check this SO thread for solution. Link to related site – Aniket Thakur Oct 6 '16 at 3:43
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Run the following in your terminal,

 sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3C962022012520A0 
 sudo apt-get update

References: How do I fix the GPG error "NO_PUBKEY"?

You need to replace the key (3C962022...) with the one that is displayed in the error message in the terminal.

  • It works for me. – Fahim Babar Patel Nov 13 '16 at 7:08
  • Me too! I'll have to read up on this. – bd1251252 Mar 24 '17 at 6:39
  • How do you achieve this on OSX? – zero_cool Oct 22 '17 at 21:06
  • If you get a keyserver timed out error, do sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3C962022012520A0 – arjun Nov 12 '17 at 15:09
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When you add a third-party repository, you should also add its key to your system. The public key is a string which identifies that certain repository. You can find some more information on this and how to add the key here.

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