[Solved] NO_PUBKEY A8580BDC82D3DC6C remains

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1

New debian (lxqt) installation. Following Installing Brave on Linux #release-channel-installation (stable) notes there …

# apt-get update
...
Get:5 https://brave-browser-apt-release.s3.brave.com stable InRelease [7,547 B]
Err:5 https://brave-browser-apt-release.s3.brave.com stable InRelease
  The following signatures couldn\'t be verified because the public key is not
 available: NO_PUBKEY A8580BDC82D3DC6C
Reading package lists... Done
W: GPG error: https://brave-browser-apt-release.s3.brave.com stable InRelease:
The following signatures couldn\'t be verified because the public key is not available:
NO_PUBKEY A8580BDC82D3DC6C
E: The repository 'https://brave-browser-apt-release.s3.brave.com stable InRelease'
is not signed.

This brought no joy:

# apt-key adv --keyserver keyserver.ubuntu.com --recv-keys A8580BDC82D3DC6C#
Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead
(see apt-key(8)).
Executing: /root/tmp/apt-key-gpghome.eIXrxEI5ZK/gpg.1.sh --keyserver
keyserver.ubuntu.com --recv-keys A8580BDC82D3DC6C
gpg: key 0BB75829C2D4E821: 2 duplicate signatures removed
gpg: key 0BB75829C2D4E821: "Brave Software <[email protected]>" not changed
gpg: Total number processed: 1
gpg:              unchanged: 1

System:

# lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 12 (bookworm)
Release:        12
Codename:       bookworm
# uname -a
Linux testw8760wq-GB 6.1.0-18-amd64
#1 SMP PREEMPT_DYNAMIC Debian 6.1.76-1 (2024-02-01) x86_64 GNU/Linux

What is the correct way to import the key used in the repository, and could the instructions on that web page be corrected, please?

And … could the page at Brave Signing Keys be updated to note the command to import the key?
[I expect many are like myself … these sorts of commands are needed so seldom, prior experience figuring out such fiddly bits is long lost.]
- I expect such manual installation will always be currently correct, regardless of the key(s) or keyserver changes between the expiry of the post, and the time a subsequent reader searches for this same answer.

2

Per (apt) Update fails no public key?
In /etc/apt/sources.list.d/brave-browser-release.list:

# Replacing:
deb [signed-by=/usr/share/keyrings/brave-browser-archive-keyring.gpg]
  https://brave-browser-apt-release.s3.brave.com/ stable main
# With:
deb [arch=amd64]
  https://brave-browser-apt-release.s3.brave.com/ stable main
# Or even just:
deb https://brave-browser-apt-release.s3.brave.com/ stable main

resolved the issue. Only the contents between ‘[’ and ‘]’ changed / was removed. [Trusting apt(-get) to only used signed repositories, regardless. (?)]

Could the page at Installing Brave on Linux #release-channel-installation be so updated, please?

It would save much time wastage and teeth-gnashing.

And, as above:

… could the page at Brave Signing Keys be updated to note the command to import the key?

3

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