Imagine you may well be correct there as - from very vague memory - I have usually got all the way up to the GRUB install phase and it's usually failed there. I suppose I would be best off documenting my experiences to help me remember and relate them to others who might be able to help. How to take screenshots of whiptail interfaces though!? I'll see if there's any way and or rely on camera photos of the screen as a fallback.
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Always set up SSH, key based of course
Is there a command line tool for screenshots that I'm not aware of? Perhaps some Ctrl + Alt + F* to switch to another console (much like multi desktops) and tell some tool to capture the console X where the setup is running? Or not. Sounds like a good idea if not
Otherwise, I guess you may have been alluding to something like VNC? That wouldn't work in console / terminal set up mode though, would it?
Always wanted a screenshot tool for documenting setup steps for posterity.
I don't use any desktop or VNC as all my systems are headless. Therefore taking pictures from a SSH client is not an issue
Pls let us know if a solution is working. This could help others if they hit by similar situation. Your DietPi Team