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    <div class="moz-cite-prefix">On 09/02/16 22:36, fred roller wrote:<br>
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    <blockquote
cite="mid:CAN4K06vN3bwBO8mJPPkjU1_bxpJ+8GN3NKug5eMkXQmB9fPk4w@mail.gmail.com"
      type="cite">
      <div dir="ltr">Have you tried 
        <div>Menu -> All Settings -> (System) Users and Groups
          -> [your user] -> Change... (next to "Password")</div>
        <div><br>
        </div>
        <div>Uncheck "Don't ask for password on login" and set your
          password.</div>
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        <div>HTH</div>
        <div>Fred</div>
      </div>
      <div class="gmail_extra"><br>
        <div class="gmail_quote">On Tue, Feb 9, 2016 at 4:53 PM, <span
            dir="ltr"><<a moz-do-not-send="true"
              href="mailto:flocculant@gmx.co.uk" target="_blank">flocculant@gmx.co.uk</a>></span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">On
            09/02/16 21:37, Tim Hanson wrote:<br>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">
              I made a mistake while installing 15.04 last month.<br>
              <br>
              When the install program asked me if I wanted a password
              challenge on boot, I checked "no" by accident.  Now I have
              a wide open laptop on boot, so that someone would have to
              merely reboot to have full access to my home directory.<br>
              <br>
              What do I do to change the system to require a password on
              boot?<br>
              <br>
            </blockquote>
            Check out /usr/share/lightdm/lightdm.conf.d/60-xubuntu.conf<br>
            <br>
            Then when you've done that - check out upgrading to 15.10 as
            soon as possible - 15.04 went end of life last week, the
            repos last for a while but will be turned off soon. <a
              moz-do-not-send="true"
              href="https://help.ubuntu.com/community/WilyUpgrades"
              rel="noreferrer" target="_blank"><a class="moz-txt-link-freetext" href="https://help.ubuntu.com/community/WilyUpgrades">https://help.ubuntu.com/community/WilyUpgrades</a></a><span
              class="HOEnZb"><font color="#888888"><br>
                <br>
                -- <br>
                xubuntu-users mailing list<br>
                <a moz-do-not-send="true"
                  href="mailto:xubuntu-users@lists.ubuntu.com"
                  target="_blank">xubuntu-users@lists.ubuntu.com</a><br>
                Modify settings or unsubscribe at: <a
                  moz-do-not-send="true"
                  href="https://lists.ubuntu.com/mailman/listinfo/xubuntu-users"
                  rel="noreferrer" target="_blank"><a class="moz-txt-link-freetext" href="https://lists.ubuntu.com/mailman/listinfo/xubuntu-users">https://lists.ubuntu.com/mailman/listinfo/xubuntu-users</a></a><br>
              </font></span></blockquote>
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    </blockquote>
    IIRC setting no password at install causes autologin, changing it
    from (System) Users and Groups just changes whether the password is
    asked for at the login screen- IF you see it.<br>
    <br>
    OP needs to remove the autologin line to stop the behaviour he sees
    currently.<br>
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