On: SSH as a Sudo Replacement

[CaliforniaKarl]

> You can't even login at failsave console.

Linux consoles (the ttys that appear over local display or remote-access KVM, or the ttyS* devices that appear over serial ports and IPMI SoL) do not use sudo or su. Those consoles use a program like `getty`, or a window-manager; all those programs are non-suid programs that are started as root.

Your system should have a root password set, for logins via console.

[TacticalCoder → CaliforniaKarl]

> Your system should have a root password set, for logins via console.

TFA says that he's prefixing his password hash with '!', making login with a root password impossible (including at the console).

Hence GP's question.