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    <p>I attempted yo upgrade my server and get this reeoe</p>
    <pre data-xconsole=""><b>[keith@ubuntuserver ~]# sudo apt update && sudo apt install -y --only-upgrade tor</b>

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

Hit:1 <a class="moz-txt-link-freetext" href="http://archive.ubuntu.com/ubuntu">http://archive.ubuntu.com/ubuntu</a> bionic InRelease
Get:2 <a class="moz-txt-link-freetext" href="https://deb.torproject.org/torproject.org">https://deb.torproject.org/torproject.org</a> bionic InRelease [4,244 B]
Get:3 <a class="moz-txt-link-freetext" href="http://archive.ubuntu.com/ubuntu">http://archive.ubuntu.com/ubuntu</a> bionic-updates InRelease [88.7 kB]
Get:4 <a class="moz-txt-link-freetext" href="http://archive.ubuntu.com/ubuntu">http://archive.ubuntu.com/ubuntu</a> bionic-backports InRelease [74.6 kB]
Get:5 <a class="moz-txt-link-freetext" href="http://archive.ubuntu.com/ubuntu">http://archive.ubuntu.com/ubuntu</a> bionic-security InRelease [88.7 kB]
Err:2 <a class="moz-txt-link-freetext" href="https://deb.torproject.org/torproject.org">https://deb.torproject.org/torproject.org</a> bionic InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 74A941BA219EC810
Reading package lists...
W: GPG error: <a class="moz-txt-link-freetext" href="https://deb.torproject.org/torproject.org">https://deb.torproject.org/torproject.org</a> bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 74A941BA219EC810
E: The repository '<a class="moz-txt-link-freetext" href="https://deb.torproject.org/torproject.org">https://deb.torproject.org/torproject.org</a> bionic InRelease' is not signed.
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    <div class="-shell-port-cmd"> <span class="-shell-port-prompt"><span
          class="-shell-port-type">[keith@<span
            data-shell-host="ubuntuserver">ubuntuserver</span> <span
            class="-shell-port-pwd" data-home="/home/keith"
            data-pwd="/home/keith" title="/home/keith">~</span>]#</span></span></div>
    <div class="-shell-port-cmd"><span class="-shell-port-prompt"><span
          class="-shell-port-type"></span></span><input type="text"
        data-command="true" autocomplete="off" spellcheck="false"
        style="width: 1718px;"><span class="-shell-port-cursor"></span></div>
    <div class="moz-cite-prefix"><br>
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    <div class="moz-cite-prefix">Thanks</div>
    <div class="moz-cite-prefix"><br>
    </div>
    <div class="moz-cite-prefix">Keith</div>
    <div class="moz-cite-prefix"><br>
    </div>
    <div class="moz-cite-prefix">On 08/28/2019 11:53 PM, Roger
      Dingledine wrote:<br>
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    <blockquote type="cite"
      cite="mid:20190829035332.GP2809@moria.seul.org">
      <pre class="moz-quote-pre" wrap="">Hi,

You are running a fast Tor relay, which is great:
<a class="moz-txt-link-freetext" href="http://rougmnvswfsmd4dq.onion/rs.html#details/2D82EF77EB07AF2B3B1BC140AAB5278E3963D64E">http://rougmnvswfsmd4dq.onion/rs.html#details/2D82EF77EB07AF2B3B1BC140AAB5278E3963D64E</a>

But that Tor version is obsolete, and because of old bugs, we will soon
cut relays running those versions out of the network. Please consider
upgrading!

The Tor 0.3.5 long-term-stable branch will be maintained until Feb 2022:
<a class="moz-txt-link-freetext" href="https://trac.torproject.org/projects/tor/wiki/org/teams/NetworkTeam/CoreTorReleases#Current">https://trac.torproject.org/projects/tor/wiki/org/teams/NetworkTeam/CoreTorReleases#Current</a>
and you can see the lifetimes of other Tor versions on that table too.

You can find Tor packages for your distro / OS here:
<a class="moz-txt-link-freetext" href="https://trac.torproject.org/projects/tor/wiki/TorRelayGuide#PlatformspecificInstructions">https://trac.torproject.org/projects/tor/wiki/TorRelayGuide#PlatformspecificInstructions</a>

Let us know if we can do anything to make the process easier.

And lastly, I am cc'ing the new network health mailing list (which
has public archives), to help us stay synced:
<a class="moz-txt-link-freetext" href="https://trac.torproject.org/projects/tor/wiki/org/teams/NetworkHealthTeam">https://trac.torproject.org/projects/tor/wiki/org/teams/NetworkHealthTeam</a>

Thanks!
--Roger

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