Make it simple for yourself. If you are at all unsure when you install, just take guided partitioning. That should set up a 512M partition for boot, a 1G partition for swap and the rest of the disk for / Unless you *really have* to partition things yourself, putting everything in one partition will normally work. Once you've done this a few times and know what you want, then you can partition separate space for /var or whatever. GPT and UEFI is the way forward on machines that support them. All the very best, as ever, Andrew Cater (amacater@debian.org)
Thank Cater!
my other PCs are in those transition period , support both legacy
mbr and modern gpt