I have looked thought the entire wiki and spent 10 mins of just searching cant find any tutorial on how to do this. I keep seeing a reference to this ftbinstall.sh but I have no idea what that is. Can someone please help?
Read through this post: Install FTB Infinity 1.7 server for noobs
There are several other threads about FTB in this fora all ready, quite a few of them ask the same, “how do I do this”.