I have a fully working system which is on one of my SD-cards(#1). I would like to copy everything to another sd card(#2). There are a few problems here:
1) I don't know which version of NOOB or jessie I have. So I don't know which I have to download in order to fully replicate the system
2) The approach I'd like to try: download and install the same version of NOOB or jessie (I think I have tried them all so far...) and remove the kernel from #2 and replace it with the good kernel from #1 so I have two fully identical systems.
How can I find out which version of jessie or NOOB I have? Can I just replace the kernel with my own one? Should I only replace kernel.img or also kernel7.img?
I am aware that those are a lot of questions all at once, but I have tried may things so far....
My good sd card is divided in 2 partitions (when using linux I can see that, I can't see that when reading the SD card from my windows system ). One with the kenel image and special files while the other partition contains the linux file system. I thus tried to just naively copy everything from both partitions. However my linux system prohibits me to copy the linux file system to the second SD-card.