We have a RHEL8 machine in a different city that needs to be rescued. The machine is connected to a serial console, and we can successfully access the BIOS and choose a disk to boot from.
Our problem starts when we choose our existing USB rescue disk - nothing happens on the serial console, we lose serial access.
We need a Linux rescue disk that "just works" out the box with a serial cable. Does such a rescue disk exist?
There are a lot of hits for instructions on how to modify grub after booting, but these presuppose a suitably qualified person at the keyboard, and we do not have that. This is why this question relates to rescue with built in serial support, not serial support that is added in afterwards at the physical keyboard of the machine.
