On RHEL7, /etc/init/control-alt-delete.override no more working to override key combination, how to disable the Ctrl-Alt-Del in RHEL7 ?
If requirement is to disable the ctrl + Alt + delete key combination, one need to mask a service. This is like disabling a service,
Run the following command:
# ln -sf /dev/null /etc/systemd/system/ctrl-alt-del.target
NOTE: systemd will recognize units symlinked to /dev/null and show them as masked. If one try to send key combination, this will fail with following similar error.