Setting up a usb serial port as a server console

[Robert Moskowitz]

On 6/15/25 4:00 AM, Jeffrey Walton wrote:
> On Sun, Jun 15, 2025 at 12:41 AM Robert Moskowitz via ubuntu-users
> <ubuntu-users at lists.ubuntu.com> wrote:
>> Now that I have 2 Ubuntu servers up and running on boxes without serial
>> ports, I am concerned how I would gain access if SSH is hosed (where
>> they are is not practical to hook up a kybd/monitor).
>>
>> I was thinking to get a USB nul-modem cable:
>> [...]
> Forgive my ignorance... Under what circumstance can you attach a USB
> null modem cable, but not a USB mouse and keyboard (maybe using a USB
> hub)?

Yes, keyboard is at least as easy as a notebook. The challenge is the 
monitor.

Thus connecting a whole notebook.  Though I am surprised you did not 
suggest a simple USB connection.

I do plan on testing that too.

But I have a larger challenge.  Please look at: draft-ietf-drip-dki, sec 
6 and particularly sec 6.5

I need to prove out that this is indeed secure to meet a CA LOA (sec 
4.2.4.3).  Thus walk before I run.

All my servers in the past had a serial port for a console, now I need 
to set up my game a bit.

thanks