<![CDATA[[Duplicated]Opera's signing key not found]]>I am using Linux Mint 22.1, based on Ubuntu 24.04. I have recently started to get an error from

sudo apt-get update

"W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://deb.opera.com/opera-stable stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 11EE8C00B693A745"

I see that there's a new signing key for 2025.

I have done (again) the

wget -qO- https://deb.opera.com/archive.key | gpg --dearmor | sudo dd of=/usr/share/keyrings/opera-browser.gpg

echo "deb [signed-by=/usr/share/keyrings/opera-browser.gpg] https://deb.opera.com/opera-stable/ stable non-free" | sudo dd of=/etc/apt/sources.list.d/opera-archive.list

per the instructions at https://deb.opera.com/manual.html

Same error.

I have downloaded and installed opera-stable_119.0.5497.56_amd64.deb

Same error.

The various files look OK:

$ cat /etc/apt/sources.list.d/opera-stable.list 
deb [signed-by=/usr/share/keyrings/opera-stable-archive-keyring.gpg] https://deb.opera.com/opera-stable/ stable non-free

$ ls -lha /usr/share/keyrings/opera-browser.gpg 
-rw-r--r-- 1 root root 1.8K Jun  2 14:04 /usr/share/keyrings/opera-browser.gpg

.. but at the moment, I have Opera installed and working, but the system has stopped being able to check for updates.

]]>https://forums.opera.com/topic/85007/duplicated-opera-s-signing-key-not-foundRSS for NodeSat, 06 Jun 2026 02:25:42 GMTMon, 02 Jun 2025 13:54:09 GMT60<![CDATA[Reply to [Duplicated]Opera's signing key not found on Sat, 12 Jul 2025 03:34:21 GMT]]>@dlsumy Thanks, this worked for me too on MX Linux.

]]>https://forums.opera.com/post/389187https://forums.opera.com/post/389187Sat, 12 Jul 2025 03:34:21 GMT<![CDATA[Reply to [Duplicated]Opera's signing key not found on Tue, 03 Jun 2025 09:19:23 GMT]]>@dlsumy Ah, thanks - somehow I managed to delete the wrong file for Opera in /etc/apt/sources.list.d/ (having two was causing a different error) and removed the new one rather than the old one.

Why Opera decided to change the name of the file is a different question 🙂

]]>https://forums.opera.com/post/386475https://forums.opera.com/post/386475Tue, 03 Jun 2025 09:19:23 GMT<![CDATA[Reply to [Duplicated]Opera's signing key not found on Tue, 03 Jun 2025 05:33:41 GMT]]>Hello
I had the same problem in my Ubuntu.
I solved it like this: first I downloaded the updated key with the command:

sudo wget -qO- https://deb.opera.com/archive.key | gpg --dearmor | sudo dd of=/usr/share/keyrings/opera-browser.gpg

Then I corrected the file /etc/apt/sources.list.d/opera-stable.list to this state:

deb [signed-by=/usr/share/keyrings/opera-browser.gpg] https://deb.opera.com/opera-stable/ stable non-free

Now everything is updating normally for me.

]]>https://forums.opera.com/post/386464https://forums.opera.com/post/386464Tue, 03 Jun 2025 05:33:41 GMT<![CDATA[Reply to [Duplicated]Opera's signing key not found on Mon, 02 Jun 2025 20:34:24 GMT]]>@leocg

Thanks, but that just points to the page I've linked to (and copied the commands from) above.

I've done that. I'm still getting the 'public key not available' error.

]]>https://forums.opera.com/post/386443https://forums.opera.com/post/386443Mon, 02 Jun 2025 20:34:24 GMT<![CDATA[Reply to [Duplicated]Opera's signing key not found on Mon, 02 Jun 2025 19:53:20 GMT]]>@ModernMajorGeneral See https://forums.opera.com/post/386055

]]>https://forums.opera.com/post/386438https://forums.opera.com/post/386438Mon, 02 Jun 2025 19:53:20 GMT<![CDATA[Reply to [Duplicated]Opera's signing key not found on Mon, 02 Jun 2025 16:48:41 GMT]]>OK, it's been tagged as 'duplicated', and I know this sort of thing happens every time Opera change their signing key, but where's the solution?

I've looked back as far as 2023 in this bit without spotting anyone else having a problem with this recently, never mind been given the solution for the missing 2025 signing key.

]]>https://forums.opera.com/post/386423https://forums.opera.com/post/386423Mon, 02 Jun 2025 16:48:41 GMT