Yesterday, dealt with a machine in a pretty bad state: SSH was Down Memory was exhausted (OOM) Ctrl + Alt + Del from VNC was not responding A background operation on the OpenStack API was preventing any nova reboot --hard zombie-essential-instance.my-infra.net In such situations, the last resort is Alt+SysRQ+b to force the host into immediate reboot, possible loosing or corrupting data data in the way. The trick is that, obviously, you can not type this sequence on your laptop as usual, or th...
