Finding out about Debian now. I thought it was just about the same as Ubuntu. But when I installed a server on a old Magnia SG30 with a Celeron one core 32-Bit CPU.
But installing it could not find the 2 ethernet drives for the built in ones.
I had to add to the /etc/apt/sources.list file 7 lines that at the end that all end in "non-free" but did not have to pay for them. That did make it see the 2 Ethernet drivers.
So I am finding out non-free is non-open because they don't give away the source code. So I guess that is way because someone has to pay for the source code so non-free? But if so that just the source code not the driver and it must be free. So should be non-open.
-Raymond Day