Console In/Output to ILOM

After a default Linux (in my case Oracle Linux 7.4) installation you won’t see anything after grub finished with “start /HOST/console”

Trick:

Worked on linux 7.4 running on Oracle Server X7-2

Spawn a TTY service on your serial console device port as a service:

# systemctl --now enable getty@ttyS0
Created symlink from /etc/systemd/system/getty.target.wants/getty@ttyS0.service to /usr/lib/systemd/system/getty@.service.

Another way is to tell grub2 to use the console... then you would also see booting and shutdown messages:

# grubby --remove-args="rhgb quiet" --args=console=ttyS0,9600 --update-kernel=ALL

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