Error trying to run ServerStart.sh for FTB Infinity 1.7 [closed]

1. I don't know much of anything about Ubuntu (which is the OS I am using, 14.04 LTS)
2. I have installed the latest version of Java (jre1.8.0_40)
3. I have never tried to run a Minecraft server before
4. I have been trying to figure this out for days. If I need to start over completely, please tell me/help me with that?

Here's the error I am currently getting:

running install script!
ServerStart.sh: line 4: ./FTBInstall.sh: Permission denied
make sure to read eula.txt before playing!
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=256m; support was removed in 8.0
Java HotSpot(TM) 64-Bit Server VM warning: Using the ParNew young collector with the Serial old collector is deprecated and will likely be removed in a future release
We appear to be missing one or more essential library files.
You will need to add them to your server before FML and Forge will run successfully.java.lang.ClassNotFoundException: net.minecraft.launchwrapper.Launch
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at cpw.mods.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:25)
at cpw.mods.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:12)