[systemd-devel] log_target=console and multiple console devices

[Andrei Borzenkov]

Quoting https://freedesktop.org/wiki/Software/systemd/Debugging/

console= can be specified multiple times, systemd will output to all of
them.


That's wrong. systemd will write to /dev/console and according to kernel
documentation (and my experience :) ) kernel will forward it only to the
last listed console. From
https://www.kernel.org/doc/html/latest/admin-guide/serial-console.html:

You can specify multiple console= options on the kernel command line.
Output will appear on all of them. The last device will be used when you
open /dev/console.

So *kernel* output will indeed be duplicated to all of them, but not
output written to /dev/console.