I have 20.04 on a 4GB usb stick, the install went surprising well on my desktop (Intel i5 3570k, 64 bit, gigbit mobo, not sure what else is relavent,...
Title says it all. I have an executable script in the /etc/network/if-up.d/ folder. If I run sudo /etc/network/ifup.d/myscript it runs just fine, but...
I have no experience in what you are doing. I am trying to understand the process. I am guessing that you use WinPE to carry out bullet points 2 - 5....