apt-get update I was seeing errors:
W: https://packagecloud.io/timescale/timescaledb/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.
Although the warning is annoying, it doesn’t stop things updating. I understand the reasons why the legacy keyring is being removed.
Migrate existing keys to the new keyring
First, list the keys:
sudo apt-key list
In my case, i’ve got two – one for PostgreSQL and one for timescaledb. You will probably see a bunch of extra keys here too.
rob@localhost:~$ sudo apt-key list Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)). /etc/apt/trusted.gpg -------------------- pub rsa4096 2011-10-13 [SC] B97B 0AFC AA1A 47F0 44F2 44A0 7FCC 7D46 ACCC 4CF8 uid [ unknown] PostgreSQL Debian Repository pub rsa4096 2018-10-19 [SCEA] 1005 FB68 604C E9B8 F687 9CF7 59F1 8EDF 47F2 4417 uid [ unknown] https://packagecloud.io/timescale/timescaledb (https://packagecloud.io/docs#gpg_signing) <[email protected]> sub rsa4096 2018-10-19 [SEA]
Export the key by copying the last 8 characters of the identifier. Because I have two keys to export, i did this twice, giving each key a unique filename under
rob@localhost:~$ sudo apt-key export ACCC4CF8 | sudo gpg --dearmour -o /etc/apt/trusted.gpg.d/postgres.gpg Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)). rob@localhost:~$ sudo apt-key export 47F24417 | sudo gpg --dearmour -o /etc/apt/trusted.gpg.d/timescaledb.gpg Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).
Bingo – package updates now work! But if they don’t you might get this error:
W: http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/postgres.gpg are ignored as the file is not readable by user '_apt' executing apt-key.
In which case, check out this other post explaining how to solve it.