<div dir="ltr"><div>This might help:<br><a href="http://askubuntu.com/questions/93542/how-to-disable-shutdown-reboot-suspend-hibernate">http://askubuntu.com/questions/93542/how-to-disable-shutdown-reboot-suspend-hibernate</a><br><br></div>i.e. disable these actions for the 'lightdm' user.<br></div><br><div class="gmail_quote"><div dir="ltr">On Fri, 1 Jul 2016 at 20:10 Klaus Merkel <<a href="mailto:k.merkel@lan1.de">k.merkel@lan1.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  

    
  
  <div bgcolor="#FFFFFF" text="#000000">
    <font face="Calibri">Hi,<br>
      <br>
      I'm in the process of building a kiosk system and have to lock it
      down. Now I need to disable or remove entirely the option to
      reboot, shutdown and send the system into hibernation. I'm running
      xbunutu 16.04. <br>
      <br>
      Is this possible?<br>
      <br>
      Best regards<br>
      <br>
      Klaus Merkel<br>
    </font>
    <div>-- <br>
      
      <div>-- <br>
        <blockquote style="margin:0 0 0 40px;border:none;padding:0px">
          <span style="color:rgb(20,66,102);font-family:'Calibri ',sans-serif;font-size:14pt">Klaus Merkel</span><br>
          <span style="font-size:12pt;font-family:Calibri,sans-serif;color:rgb(127,127,127)">IT Specialist</span><br>
          <div style="font-size:10pt;font-family:Calibri,sans-serif;color:rgb(127,127,127)"> <span>--</span><br>
            <span>LAN1 Hotspots GmbH</span><br>
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            <br>
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            <a href="mailto:k.merkel@lan1.de" style="color:rgb(20,66,102)" target="_blank">k.merkelh@lan1.de</a><br>
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          </div>
        </blockquote>
      </div>
    </div>
  </div>

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</blockquote></div>