The commands are mentioned in the aforementioned wiki page. There is even an example for PDFs. Just read it.
on 12/03/2012 – Made popular on 12/03/2012
If lxde-logout is hard-coded to use consolekit then it has to either be fixed upstream or patched in someway. With the current systemd + polkit, you can simply use these commands:https://wiki.archlinux.org/index.php/Sy … management