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How to fix NO_PUBKEY errors in "apt-get update" operations

Fri, 2007.05.25 - 12:23 — müzso
You can find the answer in this post, but I also document it here so I'll have a permanent copy.

Let's suppose you've got an error like this:
W: GPG error: http://ftp.de.debian.org stable/non-US Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F1D53D8C4F368D5D
W: You may want to run apt-get update to correct these problems

You should run the following to fix it (substitute F1D53D8C4F368D5D with the one from your error message):
gpg --keyserver subkeys.pgp.net --recv F1D53D8C4F368D5D
gpg --export --armor F1D53D8C4F368D5D | apt-key add -

Now you can run apt-get update and will not get an error message.

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Mon, 2007.06.04 - 09:41 — EL0HIM (not verified)

sudo gpg --keyserver


sudo gpg --keyserver subkeys.pgp.net --recv F1D53D8C4F368D5D
gpg: requesting key 4F368D5D from hkp server subkeys.pgp.net
gpg: key 4F368D5D: public key "Debian Archive Automatic Signing Key (2005) <ftpmaster@debian.org>" imported
gpg: 3 marginal(s) needed, 1 complete(s) needed, PGP trust model
gpg: depth: 0  valid:   1  signed:   0  trust: 0-, 0q, 0n, 0m, 0f, 1u
gpg: Total number processed: 1
gpg:               imported: 1


sudo gpg --export --armor F1D53D8C4F368D5D | apt-key add -
gpg: can't open `/etc/apt/trusted.gpg'
gpg: keydb_get_keyblock failed: eof
gpg: no writable keyring found: eof
gpg: error reading `-': general error
gpg: import from `-' failed: general error


So don't work Sad

Mon, 2007.06.04 - 11:00 — müzso

are keyrings installed?

Check whether you've the appropriate keyring package installed.
On Debian it's the debian-archive-keyring package, on Ubuntu it's the ubuntu-keyring package. If you've the keyring package installed, then try to update the keys with an apt-key update first and try to add the missing key (as described in my original post) only afterwards.

Wed, 2007.06.27 - 00:54 — Michael Brown (not verified)

sudo doesnt carry across the

sudo doesnt carry across the pipe. You need to:

sudo gpg --export --armor F1D53D8C4F368D5D | sudo apt-key add -

Note the second 'sudo'

Wed, 2007.06.27 - 14:13 — müzso

Re: sudo doesnt ...

Thanks. I didn't notice that one in example by EL0HIM. I used to start a root shell with sudo since it makes life a lot easier if you've to execute several commands in a row with root privileges.

Fri, 2009.05.29 - 04:23 — chevre (not verified)

sudo

normaly ur message means that u have a lock on ur file for this user and if u use the solution with sudo u ll have pb too there is user usage pb so what u realy need to do is drop the first sudo and just use sudo on the second i think that ur user dont have access to apt-get so u must use :
gpg --armor --export KEY_NUMBER | sudo apt-key add -

Sun, 2011.08.14 - 07:15 — mkultra329 (not verified)

solved the problem for me!

This is one of the few sites where this solution is specified, and it worked for me. Thanks!

Thu, 2009.05.28 - 08:39 — rduke15 (not verified)

You may need to try different key servers

Had the problem with key 9AA38DCD55BE302B, but subkeys.pgp.net or keyring.debian.org didn't have the key. Eventually, it worked with wwwkeys.eu.pgp.net :

gpg --keyserver wwwkeys.eu.pgp.net --recv 9AA38DCD55BE302B
gpg --export --armor 9AA38DCD55BE302B | apt-key add -

Wed, 2009.08.05 - 23:14 — Anonymous (not verified)

Worked fine! Thank you very

Worked fine! Thank you very much Smile

Wed, 2009.09.16 - 09:21 — Ed B (not verified)

Many many thanks

Am just starting a server upgrade and had this problem. Many thanks to the original poster and especially to you for this note on the necessary lines!

Gotta love the internet!

Thu, 2009.09.17 - 20:07 — Nik (not verified)

Thanks

This worked for me too. Great!

Sat, 2010.04.10 - 00:48 — FunkyMark (not verified)

Thanx very much

You've saved me a lot of time on my way to build linux-wrap bluetooth presence box Smile

Tue, 2010.09.21 - 07:31 — pradeep (not verified)

different keys!

Excellent bro. ! thanx for gr8 help in deed.

Wed, 2010.10.20 - 13:17 — Alex (not verified)

Unfortunately

Unfortunately wwwkeys.eu.pgp.net was down, so I've just changed it to main site:

gpg --keyserver wwwkeys.pgp.net --recv 9AA38DCD55BE302B
gpg --export --armor 9AA38DCD55BE302B | apt-key add -

Fri, 2010.08.06 - 04:33 — Anonymous (not verified)

keyrings and updates

Finally!! thanks for your post!

Tue, 2010.11.09 - 23:41 — Anonymous (not verified)

What might be the original cause

I'm suffering this Problem aswell. Adding the key with apt-key add works for the next aptitude update, but doesn't fix it permanently. After the next reboot or an aptitude install package or aptitude dist-upgrade the problem is back. Any ideas.

Wed, 2010.11.10 - 10:07 — müzso

Re: What might be the original cause

Quite strange. Fortunately apt-key is a shell-script so it's easy to peek in on it's logic. Check out your /etc/apt/*.gpg files. I've there the following:
$ ls -al /etc/apt/*.gpg
-rw------- 1 root root     0 2008-10-27 11:51 /etc/apt/secring.gpg
-rw------- 1 root root  1200 2010-06-14 15:56 /etc/apt/trustdb.gpg
-rw-r--r-- 1 root root 18617 2010-10-28 13:16 /etc/apt/trusted.gpg

apt-key works with these files. Maybe one of them got corrupt. Shock Try listing the contents of your key database prior to running apt-key add ... and after running it. Optionally you could try to recreate them (of course, make a backup of your old *.gpg before going into any experimentation.

Sat, 2015.06.13 - 00:22 — Andrew DeFaria (not verified)

Server down!

Andromeda:gpg --keyserver subkeys.pgp.net --recv F1D53D8C4F368D5D
gpg: requesting key 4F368D5D from hkp server subkeys.pgp.net
gpg: keyserver timed out
gpg: keyserver receive failed: keyserver error
Andromeda:ping subkeys.pgp.net
PING subkeys.pgp.net (116.240.198.71) 56(84) bytes of data.
^C
--- subkeys.pgp.net ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 1008ms

Andromeda:

Help!

Tue, 2015.06.16 - 08:34 — müzso

Re: Server down!

The answer to this was just one more Google search away ... Wink
http://unix.stackexchange.com/questions/75892/keyserver-timed-out-when-trying-to-add-a-gpg-public-key