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    <p>THANKS Richard Greenwood!<br>
      <br>
      This was the solution:<br>
      <br>
      $ sudo add-apt-repository "deb [arch=amd64]
      <a class="moz-txt-link-freetext" href="https://qgis.org/ubuntu">https://qgis.org/ubuntu</a> $(lsb_release -c -s) main"<br>
      <br>
    </p>
    <p>If I can give Richard another tip, make sure it is mentioned on
      this page as well:<br>
    </p>
    <p><a class="moz-txt-link-freetext" href="https://www.qgis.org/en/site/forusers/alldownloads.html#linux">https://www.qgis.org/en/site/forusers/alldownloads.html#linux</a></p>
    <p><br>
    </p>
    <p><br>
    </p>
    <div class="moz-cite-prefix">On 26-01-2022 14:48, Richard Greenwood
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAHBySPY=eH4DibMUJXGYGXnj-AnucObRyaBSnFMHudq=UW+bhA@mail.gmail.com">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <div dir="ltr">The "apt" package manager is looking for a 32 bit
        version of QGIS, which doesn't exist and which you don't want.
        Adjust your 
        <div>   /etc/apt/sources.list<br>
          <div>to look something like:<br>
            <div>   deb <b>[arch=amd64]</b> <a
                href="https://qgis.org/ubuntu-ltr"
                moz-do-not-send="true" class="moz-txt-link-freetext">https://qgis.org/ubuntu-ltr</a>
              focal main<br>
                 deb-src <b>[arch=amd64]</b> <a
                href="https://qgis.org/ubuntu-ltr"
                moz-do-not-send="true" class="moz-txt-link-freetext">https://qgis.org/ubuntu-ltr</a>
              focal main</div>
            <div>for the LTR releases or:</div>
            <div>   deb <b>[arch=amd64]</b> <a
                href="https://qgis.org/ubuntu" moz-do-not-send="true"
                class="moz-txt-link-freetext">https://qgis.org/ubuntu</a>
              focal main<br>
                 deb-src <b>[arch=amd64]</b> <a
                href="https://qgis.org/ubuntu" moz-do-not-send="true"
                class="moz-txt-link-freetext">https://qgis.org/ubuntu</a>
              focal main<br>
            </div>
          </div>
        </div>
        <div>for the current releases. The important part is in bold:  <b>[arch=amd64]</b> you
          might not be on "focal".</div>
        <div><br>
        </div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">On Wed, Jan 26, 2022 at 6:29
          AM Gerard Frijters <<a
            href="mailto:gerard.frijters@gmail.com"
            moz-do-not-send="true" class="moz-txt-link-freetext">gerard.frijters@gmail.com</a>>
          wrote:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0px 0px 0px
          0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
          <div>
            <p>Hi everybody, I am using a Linux system, Ubuntu.<br>
            </p>
            <p>I just have a little problem with the preinstallation of
              QGIS. Can any of you tell me how to fix this?<br>
            </p>
            <p><br>
            </p>
            <a
href="https://www.qgis.org/en/site/forusers/alldownloads.html#linuxQuickstart"
              target="_blank" moz-do-not-send="true"
              class="moz-txt-link-freetext">https://www.qgis.org/en/site/forusers/alldownloads.html#linuxQuickstart</a>
            <p>Debian/Ubuntu<br>
            </p>
            <pre><span>sudo</span> <span>apt</span> <span>install</span> <span>gnupg</span> <span>software</span><span>-</span><span>properties</span><span>-</span><span>common

</span><span>wget</span> <span>-</span><span>qO</span> <span>-</span> <span>https</span><span>:</span><span>//</span><span>qgis</span><span>.</span><span>org</span><span>/</span><span>downloads</span><span>/</span><span>qgis</span><span>-</span><span>2021.</span><span>gpg</span><span>.</span><span>key</span> <span>|</span> <span>sudo</span> <span>gpg</span> <span>--</span><span>no</span><span>-</span><span>default</span><span>-</span><span>keyring</span> <span>--</span><span>keyring</span> <span>gnupg</span><span>-</span><span>ring</span><span>:</span><span>/</span><span>etc</span><span>/</span><span>apt</span><span>/</span><span>trusted</span><span>.</span><span>gpg</span><span>.</span><span>d</span><span>/</span><span>qgis</span><span>-</span><span>archive</span><span>.</span><span>gpg</span> <span>--</span><span>import</span>
<span>
sudo</span> <span>chmod</span> <span>a</span><span>+</span><span>r</span> <span>/</span><span>etc</span><span>/</span><span>apt</span><span>/</span><span>trusted</span><span>.</span><span>gpg</span><span>.</span><span>d</span><span>/</span><span>qgis</span><span>-</span><span>archive</span><span>.</span><span>gpg

</span><span>sudo</span> <span>add</span><span>-</span><span>apt</span><span>-</span><span>repository</span> <span>"deb <a href="https://qgis.org/ubuntu" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">https://qgis.org/ubuntu</a> $(lsb_release -c -s) main"

</span>
<span></span><span></span><span></span><span></span></pre>
            <p>Here I come across the following message:</p>
            <p>    N: Skipping acquire of configured file
              'main/binary-i386/Packages' as repository '<a
                href="https://qgis.org/ubuntu" target="_blank"
                moz-do-not-send="true" class="moz-txt-link-freetext">https://qgis.org/ubuntu</a>
              focal InRelease' doesn't support architecture 'i386'</p>
            <p><br>
            </p>
            <p>The output of the last command:<br>
            </p>
            <p>$ sudo add-apt-repository "deb <a
                href="https://qgis.org/ubuntu" target="_blank"
                moz-do-not-send="true" class="moz-txt-link-freetext">https://qgis.org/ubuntu</a>
              $(lsb_release -c -s) main"<br>
            </p>
            <p>    Hit:1 <a href="http://nl.archive.ubuntu.com/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://nl.archive.ubuntu.com/ubuntu</a>
              focal InRelease<br>
                  Get:2 <a href="http://nl.archive.ubuntu.com/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://nl.archive.ubuntu.com/ubuntu</a>
              focal-updates InRelease [114 kB]     <br>
                  Hit:3 <a
                href="http://ppa.launchpad.net/inkscape.dev/stable/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://ppa.launchpad.net/inkscape.dev/stable/ubuntu</a>
              focal InRelease      <br>
                  Hit:4 <a
                href="http://ppa.launchpad.net/linuxgndu/sqlitebrowser/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://ppa.launchpad.net/linuxgndu/sqlitebrowser/ubuntu</a>
              focal InRelease  <br>
                  Get:5 <a href="http://nl.archive.ubuntu.com/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://nl.archive.ubuntu.com/ubuntu</a>
              focal-backports InRelease [108 kB]   <br>
                  Hit:6 <a
                href="http://ppa.launchpad.net/team-xbmc/ppa/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://ppa.launchpad.net/team-xbmc/ppa/ubuntu</a>
              focal InRelease            <br>
                  Get:7 <a href="https://qgis.org/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">https://qgis.org/ubuntu</a>
              focal InRelease [2.731 B]                        <br>
                  Get:8 <a href="http://security.ubuntu.com/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://security.ubuntu.com/ubuntu</a>
              focal-security InRelease [114 kB]      <br>
                  Get:9 <a href="http://nl.archive.ubuntu.com/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://nl.archive.ubuntu.com/ubuntu</a>
              focal-updates/main i386 Packages [592 kB]<br>
                  Hit:10 <a href="https://download.sublimetext.com"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">https://download.sublimetext.com</a>
              apt/dev/ InRelease                     <br>
                  Get:11 <a href="http://nl.archive.ubuntu.com/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://nl.archive.ubuntu.com/ubuntu</a>
              focal-updates/main amd64 Packages [1.510 kB]<br>
                  Get:12 <a href="https://qgis.org/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">https://qgis.org/ubuntu</a>
              focal/main amd64 Packages [26,4 kB]             <br>
                  Get:13 <a href="http://nl.archive.ubuntu.com/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://nl.archive.ubuntu.com/ubuntu</a>
              focal-updates/main amd64 DEP-11 Metadata [281 kB]<br>
                  Get:14 <a href="http://nl.archive.ubuntu.com/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://nl.archive.ubuntu.com/ubuntu</a>
              focal-updates/universe i386 Packages [664 kB]<br>
                  Get:15 <a href="http://nl.archive.ubuntu.com/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://nl.archive.ubuntu.com/ubuntu</a>
              focal-updates/universe amd64 Packages [894 kB]<br>
                  Get:16 <a href="http://security.ubuntu.com/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://security.ubuntu.com/ubuntu</a>
              focal-security/main amd64 DEP-11 Metadata [40,7 kB]<br>
                  Get:17 <a href="http://security.ubuntu.com/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://security.ubuntu.com/ubuntu</a>
              focal-security/universe amd64 DEP-11 Metadata [66,4 kB]<br>
                  Get:18 <a href="http://nl.archive.ubuntu.com/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://nl.archive.ubuntu.com/ubuntu</a>
              focal-updates/universe amd64 DEP-11 Metadata [364 kB]<br>
                  Get:19 <a href="http://security.ubuntu.com/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://security.ubuntu.com/ubuntu</a>
              focal-security/multiverse amd64 DEP-11 Metadata [2.464 B]<br>
                  Get:20 <a href="http://nl.archive.ubuntu.com/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://nl.archive.ubuntu.com/ubuntu</a>
              focal-updates/multiverse amd64 DEP-11 Metadata [944 B]<br>
                  Get:21 <a href="http://nl.archive.ubuntu.com/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://nl.archive.ubuntu.com/ubuntu</a>
              focal-backports/main amd64 DEP-11 Metadata [7.988 B]<br>
                  Get:22 <a href="http://nl.archive.ubuntu.com/ubuntu"
                target="_blank" moz-do-not-send="true"
                class="moz-txt-link-freetext">http://nl.archive.ubuntu.com/ubuntu</a>
              focal-backports/universe amd64 DEP-11 Metadata [12,2 kB]<br>
            </p>
            <p>    Fetched 4.801 kB in 2s (2.797
              kB/s)                                  <br>
                  Reading package lists... Done<br>
            </p>
            <p>    N: Skipping acquire of configured file
              'main/binary-i386/Packages' as repository '<a
                href="https://qgis.org/ubuntu" target="_blank"
                moz-do-not-send="true" class="moz-txt-link-freetext">https://qgis.org/ubuntu</a>
              focal InRelease' doesn't support architecture 'i386'</p>
          </div>
          _______________________________________________<br>
          Qgis-user mailing list<br>
          <a href="mailto:Qgis-user@lists.osgeo.org" target="_blank"
            moz-do-not-send="true" class="moz-txt-link-freetext">Qgis-user@lists.osgeo.org</a><br>
          List info: <a
            href="https://lists.osgeo.org/mailman/listinfo/qgis-user"
            rel="noreferrer" target="_blank" moz-do-not-send="true"
            class="moz-txt-link-freetext">https://lists.osgeo.org/mailman/listinfo/qgis-user</a><br>
          Unsubscribe: <a
            href="https://lists.osgeo.org/mailman/listinfo/qgis-user"
            rel="noreferrer" target="_blank" moz-do-not-send="true"
            class="moz-txt-link-freetext">https://lists.osgeo.org/mailman/listinfo/qgis-user</a><br>
        </blockquote>
      </div>
      <br clear="all">
      <div><br>
      </div>
      -- <br>
      <div dir="ltr" class="gmail_signature">
        <div dir="ltr">Richard W. Greenwood<br>
          <a href="http://www.greenwoodmap.com" target="_blank"
            moz-do-not-send="true">www.greenwoodmap.com</a></div>
      </div>
    </blockquote>
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