Thank you slughorn, I will have try this stuff out soon!

I just installed GhostBSD yesterday and I'm wanting to install a Linux program; Firestorm viewer. It comes in tar.xz file. I know how to extract it, but I just don't know the proper commands to install it. It has a file named install.sh. I'm familar with LInux, but BSD is new to me. I'm also use the...