Adding new PPA is causing GPG error after apt-get update

Question

Recently I had a lot of GPG errors with the following message

W: GPG error: http://ppa.launchpad.net trusty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY *****************

I removed them with using What is the easiest way to resolve apt-get BADSIG GPG errors? and with the help from other sites. But now every time I add new PPA and try to update I got the GPG Error for the last added PPA.

Using Y-PPA > Advanced > Try to import all missing GPG keys removes the error/s but it will show again for every new PPA added. Can someone tell me why I got GPG error every time and how to fix it permanently.

using Ubuntu 14.04 x64 EDIT: Problem solved. I was missing /etc/apt/trusted.gpg.d

how many ppas do you have? you can have only so many gpg keys installed. also, how do you add a ppa? sudo add-apt-repository? — mchid, Oct 25 '15 at 06:37
I have around 40 PPAs , and yes I use sudo add-apt-repository. I didn't have problems two months ago, this thing start to happen in one month maybe. — Tosho, Oct 25 '15 at 07:52

mchid · Accepted Answer · 2015-10-25T08:30:58.570

1

The problem is that you have too many ppas.

Apt can only handle 40 keys in /etc/apt/trusted.gpg.d.

Delete some gpg keys and ppas.

See here for some more info.

EDIT

Because you have no /etc/apt/trusted.gpg.d directory, just run the following command to fix the issue:

sudo mkdir /etc/apt/trusted.gpg.d

edited Oct 25 '15 at 08:30

answered Oct 25 '15 at 07:56

mchid

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they are exactly 37 PPAs, and I did delete some before. And I don't have /etc/apt/trusted.gpg.d only - apt.conf.d, preferences.d,, sources.list.d – Tosho Oct 25 '15 at 07:58
@Tosho sorry, the limit is 40 keys not 40 ppas. delete some keys – mchid Oct 25 '15 at 08:01
@Tosho also, what happened to this directory? no wonder you are having this problem adding keys, the directory does not exist. – mchid Oct 25 '15 at 08:03
I might deleted the folder - https://bugs.launchpad.net/apt/+bug/1263540/comments/35 – Tosho Oct 25 '15 at 08:15
just run sudo mkdir /etc/apt/sources.list.d – mchid Oct 25 '15 at 08:16
1

I have /etc/apt/sources.list.d ? do you mean - /etc/apt/trusted.gpg.d/ ? – Tosho Oct 25 '15 at 08:22
@Tosho yes, that is it – mchid Oct 25 '15 at 08:24
Let us continue this discussion in chat. – Tosho Oct 25 '15 at 08:24

Adding new PPA is causing GPG error after apt-get update

1 Answers1