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by CaliforniaKarl
729 days ago
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> 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. |
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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.