Blatherskite

Hey, i'm quite new around here, so first things first, sorry if this is some kind of noob question, and also sorry for my bad english. I'm currently learning around the curves about building a ragnarok private server and i want to use this gorgeus project as the client (because it's said to be able to run natively on linux xD), but i wonder how do i set it up exactly? I've read the guide and there's one thing missing for me, where do i had to take the data.grf file from? do i need to use latest kRO's full client and extract AEsir's client there? p.s. i want to build a vanilla server using rAthena as the emulator, so i've no client data currently (i've tried building one with some setup guide from rAthena and use a pre-re and renewal server there). thanks before.