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The easy way to fix these warning messages generated by sudo apt update …
W: https://linux.teamviewer.com/deb/dists/stable/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: http://apt.keepsolid.com/ubuntu/dists/groovy/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: http://linux.dropbox.com/ubuntu/dists/disco/Release.gpg: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: http://download.virtualbox.org/virtualbox/debian/dists/hirsute/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: http://download.opensuse.org/repositories/home:/IBBoard:/cawbird/xUbuntu_22.04/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: http://ppa.launchpad.net/solaar-unifying/stable/ubuntu/dists/jammy/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: http://ppa.launchpad.net/team-xbmc/ppa/ubuntu/dists/jammy/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu/dists/jammy/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.Code language: JavaScript (javascript)Note: These warning messages can be generated by any enabled repo or ppa in Software & Updates «Other Software» tab.
Example fix:
For this warning message with sudo apt update…
W: http://ppa.launchpad.net/team-xbmc/ppa/ubuntu/dists/jammy/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
Code language: JavaScript (javascript)We look in sudo apt-key list and find this entry for xbmc…
pub rsa1024 2009-01-20 [SC]
1897 01DA 570C 56B9 488E F60A 6D97 5C47 91E7 EE5E
uid [ unknown] Launchpad PPA for XBMC for Linux
Code language: CSS (css)Then we convert this entry to a .gpg file, using the last 8 numeric characters from above…
sudo apt-key export 91E7EE5E | sudo gpg --dearmour -o /etc/apt/trusted.gpg.d/team-xbmc.gpg
Code language: JavaScript (javascript)Optionally you can remove the deprecated key from /etc/apt/trusted.gpg by running:
sudo apt-key --keyring /etc/apt/trusted.gpg del 91E7EE5E
Repeat the above commands for each warning message generated by sudo apt update.