Thanks for the info. I understand why you would generally want it enabled, but I'm implementing RHEL STIGs for goverment use and one of the requirements is to disable ctrl-alt-del. The disabling instructions worked for gnome, but not the console.
V-71993 - The x86 Ctrl-Alt-Delete key sequence must be disabled. - RHEL-07-020230
Severity
High
Description
A locally logged-on user who presses Ctrl-Alt-Delete, when at the console, can reboot the system. If accidentally pressed, as could happen in the case of a mixed OS environment, this can create the risk of short-term loss of availability of systems due to unintentional reboot. In the GNOME graphical environment, risk of unintentional reboot from the Ctrl-Alt-Delete sequence is reduced because the user will be prompted before any action is taken.