When I sudo apt-get update I get the error shown below.
W: An error occurred during the signature verification.
The repository is not updated and the previous index files will be used.
GPG error: bionic InRelease:
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 76F1A20FF987672F
W: Failed to fetch
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 76F1A20FF987672F
W: Some index files failed to download. They have been ignored, or old ones used instead.So I go ahead and change my mirror as suggested by this Ask Ubuntu answer. Then I restart the computer. And I still get the same error above when I sudo apt-get update.
Let's try and reinstall the keys.
$ wget -nc && sudo apt-key add Release.key
File ‘Release.key’ already there; not retrieving. OKAnd I might as well ping -c3 archive.ubuntu.com and my packet loss is 0%. What else do I need to do?
5 Answers
As of 2018-12-19 08:07 there is a new winehq.key keyfile as mentioned here.
Download the new repository key and add it to the list of trusted keys:
cd /tmp
wget -nc
sudo apt-key add winehq.key
sudo apt updateAs mentioned by @jason-hunter in a comment, apt update will ask if you accept the changes in the repository, whereas apt-get update will show an error and fail.
Note that after adding the new keyfile, it is better to use apt update rather than apt-get update, as it will prompt you to accept the changes.
So in full:
wget -nc && sudo apt-key add winehq.key && sudo apt updateInspecting , there's a new file winehq.key. Try using that instead, as its fingerprint seems to match the error:
# curl -sL "" | gpg --dry-run --import --verbose
gpg: pub rsa4096/818A435C5FCBF54A 2015-11-23 Sebastian Lackner (WineHQ packages) <>
gpg: Total number processed: 1
# curl -sL "" | gpg --dry-run --import --verbose
gpg: pub rsa3072/76F1A20FF987672F 2018-12-10 WineHQ packages <>
gpg: key 76F1A20FF987672F: 1 signature not checked due to a missing key
gpg: Total number processed: 1This command worked for me:
wget -nc && apt-key add winehq.keyI recently was getting the same error too:
Err:3 bionic InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 76F1A20FF987672FAs it turns out, the pubkey needed to be added to my host. Adding the key is the last 8 digits of the key you see there F987672F. So add that to the following to add the key to your host:
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv F987672FHope this helps!
