Update apt/GPG keys🔗

Usually, people will give you a bunch of commands to follow, but I needed to do it a tiny bit quicker.

These guides usually tell you to find all the expired keys, and import them again, or eventually with a different keyserver.

Below is how you can do all of that in a single line:

apt-key list | grep expired | awk '{ print $2 }' | sed 's/^[^=/]*\///' | xargs -d\\n -n1 gpg --keyserver keyserver.ubuntu.com --recv-key

• apt-key list lists all the keys
• grep expired "filters" only the expired keys
• awk '{ print $2 }' only shows the second column of the previous output
• sed 's/^[^=/]*\///' removes everything before the / including the /
• xargs -d\\n -n1 gpg --keyserver keyserver.ubuntu.com --recv-key runs the key import for each expired key, and imports from the specified keyserver.

Although, another thing you may need to do also is run the below commands:

apt-get install debian-keyring debian-archive-keyring
apt-key update
apt-get update