Hello, I signed up here specifically for this reason:Dear newb script kitties of the FTB development team. Linux is case sensitive. And Java is cross platform. Your ignorance has not gone unnoticed. Please note the file MinecraftForge.zip is not the same as minecraftforge.zip. Oh I could suggest a few distros of Linux since you are new.
P.s Peved that I have to do your bug testing. And rewrite your scripts just to play your mod pack.
It looks like you don't have a Linux QA. I volunteer to take this task of testing FTB on Linux. Please mind that I don't have Windows and don't plan using it ever again.
Do you have any kind of bug tracker installed?