On some Linux-based operating systems including Ubuntu and Debian, Control + Alt + Delete is a shortcut for logging out. On Ubuntu Server, it is used to reboot a computer without logging in.

Does Ctrl Alt Delete Delete everything?

This special key combination, pronounced “Control Alt Delete,” has been around since the Personal Computer was introduced by IBM in 1981. The PC recognized this as a command to clear all software and data from its memory and reload its software from disk (called rebooting).

Does Ctrl Alt Delete reboot Linux?

The key combination “Ctrl+Alt+Del”, when pressed on a virtual console (black-screen tty), causes the system to reboot. … You do not need to reboot the server, restart any services, either any processes.