I get some errors when trying to update the package list with sudo apt-get update
command, specifically the error messages are as follows:
W: GPG error: http://dl.google.com stable Release: The following signatures were invalid: BADSIG A040830F7FAC5991 Google, Inc. Linux Package Signing Key W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://archive.canonical.com precise Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://extras.ubuntu.com precise Release: The following signatures were invalid: BADSIG 16126D3A3E5C1192 Ubuntu Extras Archive Automatic Signing Key W: Failed to fetch http://archive.canonical.com/ubuntu/dists/precise/Release W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/precise/Release W: Some index files failed to download. They have been ignored, or old ones used instead.
I'm using Kubuntu 12.04.
EDIT
I performed the commands suggested by terdon in his answer, but it still doesn't work; when trying to update the keys, I got the following output:
Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /tmp/tmp.OE3Vb6NDgl --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --recv-keys --keyserver keyserver.ubuntu.com A040830F7FAC5991 gpg: requesting key 7FAC5991 from hkp server keyserver.ubuntu.com gpg: key 7FAC5991: "Google, Inc. Linux Package Signing Key " not changed gpg: Total number processed: 1 gpg: unchanged: 1 Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /tmp/tmp.QFmVRIYHrE --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --recv-keys --keyserver keyserver.ubuntu.com 40976EAF437D05B5 gpg: requesting key 437D05B5 from hkp server keyserver.ubuntu.com gpg: key 437D05B5: "Ubuntu Archive Automatic Signing Key " not changed gpg: Total number processed: 1 gpg: unchanged: 1 Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /tmp/tmp.kJGIgNoOEW --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --recv-keys --keyserver keyserver.ubuntu.com 16126D3A3E5C1192 gpg: requesting key 3E5C1192 from hkp server keyserver.ubuntu.com gpg: key 3E5C1192: "Ubuntu Extras Archive Automatic Signing Key " not changed gpg: Total number processed: 1 gpg: unchanged: 1
And trying to use sudo apt-get update
still gives me the same errors as before.
Best Answer
You will need to import the correct GPG keys for each repository. So, for each missing key, run this command:
In your case, you are missing the keys for
A040830F7FAC5991
,40976EAF437D05B5
and16126D3A3E5C1192
, you can get all three by running:After running this command, try
sudo apt-get update
again and it should work perfectly well.Update, I was assuming that reimporting the keys would fix them, it looks like that did not work. Try this instead (source):