Disable Control-Alt-Delete

- [Instructor] Typically, when you press Ctrl + Alt + Del…all at the same time, your Linux system initiates a reboot.…If an attacker could get access…to the keyboard of the system,…then they could initiate a reboot.…That would allow them to boot into single user mode…or bypass init, for example.…It's practically like having access to the power button.…So, in what cases would someone have access…to the keyboard of a machine, but not the power button?…The most common case would be a remote console of some sort.…Some hardware vendors provide this capability…where you can connect over the network to the remote console…and type commands into the computer…just like you had plugged a keyboard into it.…

Many of those have virtual power buttons as well.…There are some remote consoles that are really KVM devices.…KVM, of course, stands for keyboard video and mouse.…If an attacker gain access to the network KVM,…then they could send keystrokes to your system.…They wouldn't have access to the power button,…but they could send a Ctrl + Alt + Del sequence.…