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    <p>It's important to use "apt" instead of "dpkg" to install
      ChimeraX.  "apt" is needed to install the dependencies.</p>
    <p>The problem with:</p>
    <p>     sudo apt install ucsf-chimerax_1.5ubuntu20.04_amd64.deb</p>
    <p>is that there is no / in the name, so "apt" thinks it is a
      package name instead of a file name.  Change it to:</p>
    <p>    sudo apt install ./ucsf-chimerax_1.5ubuntu20.04_amd64.deb</p>
    <p>Or if it is in your Downloads directory, use the example on the
      ChimeraX download page:</p>
    <p>    sudo apt install
      ~/Downloads/ucsf-chimerax_1.5ubuntu20.04_amd64.deb</p>
    <p>HTH,</p>
    <p>    Greg<br>
    </p>
    <div class="moz-cite-prefix">On 4/12/2023 5:20 AM, Rudy Richardson
      via ChimeraX-users wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CACF_HOCxkSSnrEVV+LeiSRFEP64fVC9Cb1WEOX79CBS8a539Qw@mail.gmail.com">
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        <div class="gmail_default" style="font-family:arial,sans-serif">I
          think you would need to issue the following command:</div>
        <div class="gmail_default" style="font-family:arial,sans-serif"><br>
        </div>
        <div class="gmail_default" style="font-family:arial,sans-serif">sudo
          dpkg -i <span style="font-family:Arial,Helvetica,sans-serif">ucsf-chimerax_1.5ubuntu20.04_a</span><span
            style="font-family:Arial,Helvetica,sans-serif">md64.deb</span><span
            style="font-family:Arial,Helvetica,sans-serif"> </span></div>
        <div class="gmail_default" style="font-family:arial,sans-serif"><span
            style="font-family:Arial,Helvetica,sans-serif"><br>
          </span></div>
        <div class="gmail_default" style="font-family:arial,sans-serif"><span
            style="font-family:Arial,Helvetica,sans-serif"><br>
          </span></div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">On Wed, Apr 12, 2023 at
          7:56 AM Stephen P. Molnar via ChimeraX-users <<a
            href="mailto:chimerax-users@cgl.ucsf.edu"
            moz-do-not-send="true" class="moz-txt-link-freetext">chimerax-users@cgl.ucsf.edu</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">I
          am running an up-to-date installation of Debian Bullseye on my
          Linux <br>
          platform.<br>
          <br>
          My attempt to install ucsf-chimerax_1.5ubuntu20.04_amd64.deb
          generated <br>
          an interesting error message:<br>
          <br>
               sudo apt install ucsf-chimerax_1.5ubuntu20.04_amd64.deb
          [sudo] <br>
          password for comp:<br>
               Reading package lists... Done<br>
               Building dependency tree... Done<br>
               Reading state information... Done<br>
               E: Unable to locate package
          ucsf-chimerax_1.5ubuntu20.04_amd64.deb<br>
          <br>
          I have managed to install Chimera, both Linux and Windows
          versions, many <br>
          times without any problems.<br>
          <br>
          Guidance would be much appreciated.<br>
          <br>
          Thanks in advance,<br>
          <br>
          -- <br>
          Stephen P. Molnar, Ph.D.<br>
          <a href="https://insilicochemistry.net" rel="noreferrer"
            target="_blank" moz-do-not-send="true"
            class="moz-txt-link-freetext">https://insilicochemistry.net</a><br>
          (614)312-7528 (c)<br>
          Skype:  smolnar1<br>
          <br>
          _______________________________________________<br>
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            moz-do-not-send="true" class="moz-txt-link-freetext">ChimeraX-users@cgl.ucsf.edu</a><br>
          Manage subscription:<br>
          <a
            href="https://www.rbvi.ucsf.edu/mailman/listinfo/chimerax-users"
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            class="moz-txt-link-freetext">https://www.rbvi.ucsf.edu/mailman/listinfo/chimerax-users</a><br>
        </blockquote>
      </div>
      <br>
      <fieldset class="moz-mime-attachment-header"></fieldset>
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</pre>
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