Technical:RemoveShutdownRebootFromLogin
From K12LTSP Wiki
Quoting Eric Harrison from https://www.redhat.com/archives/k12osn/2006-April/msg00258.html
Depends on if you are using GDM or KDM.
GDM (the default), edit /etc/X11/gdm/gdm.conf (FC4 or earlier) or /etc/gdm/custom.conf (FC5 or later) and set:
~HaltCommand= ~RebootCommand= ~SuspendCommand=
Running /opt/ltsp/templates/k12linux/gdm.conf-update.pl will do this for you.
For KDM, edit /etc/X11/xdm/kdmrc and comment out (#) the following lines:
# ~HaltCmd= # ~RebootCmd=
Running opt/ltsp/templates/k12linux/kdmrc-update.pl will do this for you...
