gpgkeys: key C927EBE00F1B0520 not found on keyserver [duplicate]

Question

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

I am using 10.04 LTS - Lucid Lynx.

I shutdown the computer while a software update was running. Then after I restarted my computer and while the update manager was running, I got this error:

Could not download all repository indexes

The repository may no longer be available or could not be contacted because of network problems. If available an older version of the failed index will be used. Otherwise the repository will be ignored. Check your network connection and ensure the repository address in the preferences is correct.

GPG error: http://toolbelt.herokuapp.com ./
Release: The following signatures couldn't be verified because the public key is not available:
NO_PUBKEY C927EBE00F1B0520
Failed to fetch  http://ppa.launchpad.net/rabbitvcs/ppa/ubuntu/dists/**DISTRIBUTION**/main/binary-i386/Packages.gz
404  Not Found

I went through the answers to How do I fix the GPG error "NO_PUBKEY"?

and I tried this

$ sudo launchpad-getkeys 
Please wait... launchpad-getkeys is running an update so it can detect the missing GPG keys
Trying to import all the missing keys
gpg: requesting key 0F1B0520 from hkp server keyserver.ubuntu.com
gpgkeys: key C927EBE00F1B0520 not found on keyserver
gpg: no valid OpenPGP data found.
gpg: Total number processed: 0
launchpad-getkeys has finished importing all missing GPG keys. 
Try running sudo apt-get update - you shouldn't see any key 
errors anymore

But when I run sudo apt-get update again, it again shows that the key was not found on the keyserver. How to solve this problem?

Answer 1

There are two errors in your question, one of them producing the GPG error.

 GPG error: http://toolbelt.herokuapp.com ./
 Release: The following signatures couldn't be verified because the public key is not available:
 NO_PUBKEY C927EBE00F1B0520

This GPG error is not related to Launchpad and as a result the keys cannot be retrieved with launchpad-getkeys. Following the instructions on http://toolbelt.herokuapp.com/linux/readme, you have to add the key with:

wget -q -O - http://toolbelt.herokuapp.com/apt/release.key | apt-key add -

Be aware that external repositories may be unsafe, only add repositories and keys that you really trust.

Failed to fetch http://ppa.launchpad.net/rabbitvcs/ppa/ubuntu/dists/\*\*DISTRIBUTION\*\*/main/binary-i386/Packages.gz 404 Not Found

You've made a mistake in following instructions. Edit /etc/apt/sources.list and replace **DISTRIBUTION** with your actual distribution in lowercase (e.g. oneiric). Here's a command to do this automatically:

sudo sed -i /etc/apt/sources.list "s/\*\*DISTRIBUTION\*\*/$(lsb_release -sc)/"

Answer 2

In the sources.list file replace **DISTRIBUTION** with the actual name of the distribution (in this case lucid).

Answer 3

Have you tried this:

sudo rm -r /var/lib/apt/lists
sudo mkdir -p /var/lib/apt/lists/partial
sudo aptitude update

The more elaborated & updated code for Ubuntu without aptitude is:

sudo -i  
apt-get clean  
cd /var/lib/apt  
mv lists lists.old  
mkdir -p lists/partial  
apt-get clean  
apt-get update

The solution works for the heroku toolbelt GPG key error

Source: How do I fix the GPG error no pubkey