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I put all the mods from a modpack into my mods folder of the server, and this comes up.

[23:12:45] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftfo rge.fml.common.launcher.FMLServerTweaker
[23:12:45] [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minec raftforge.fml.common.launcher.FMLServerTweaker
[23:12:45] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.f ml.common.launcher.FMLServerTweaker
[23:12:47] [main/INFO] [FML]: Forge Mod Loader version 11.15.1.1761 for Minecraf t 1.8.9 loading
[23:12:47] [main/INFO] [FML]: Java is OpenJDK 64-Bit Server VM, version 1.7.0_12 1, running on Linux:amd64:4.4.35-33.55.amzn1.x86_64, installed at /usr/lib/jvm/j ava-1.7.0-openjdk-1.7.0.121.x86_64/jre
[23:12:49] [main/ERROR] [FML]: The coremod squeek.applecore.AppleCore is request ing minecraft version 1.10.2 and minecraft is 1.8.9. It will be ignored.
[23:12:49] [main/INFO] [FML]: Loading tweaker guichaguri.betterfps.tweaker.Bette rFpsTweaker from BetterFps-1.4.4-1.10.jar
[23:12:49] [main/ERROR] [FML]: The coremod me.superckl.biometweaker.core.BiomeTw eakerCore is requesting minecraft version 1.10.2 and minecraft is 1.8.9. It will be ignored.
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: java.lang.UnsupportedClassVersionError: net/darkhax/bookshel f/asm/BookshelfLoadingPlugin : Unsupported major.minor version 52.0
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at java.lang.ClassLoader.defineClass1(Native Method)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at java.lang.ClassLoader.defineClass(ClassLoader.java:80 3)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at java.security.SecureClassLoader.defineClass(SecureCla ssLoader.java:142)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at java.net.URLClassLoader.defineClass(URLClassLoader.ja va:442)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at java.net.URLClassLoader.access$100(URLClassLoader.jav a:64)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at java.net.URLClassLoader$1.run(URLClassLoader.java:354 )
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at java.net.URLClassLoader$1.run(URLClassLoader.java:348 )
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at java.security.AccessController.doPrivileged(Native Me thod)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at java.net.URLClassLoader.findClass(URLClassLoader.java :347)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at net.minecraft.launchwrapper.LaunchClassLoader.findCla ss(LaunchClassLoader.java:117)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at java.lang.Class.forName0(Native Method)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at java.lang.Class.forName(Class.java:278)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at net.minecraftforge.fml.relauncher.CoreModManager.load CoreMod(CoreModManager.java:536)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at net.minecraftforge.fml.relauncher.CoreModManager.disc overCoreMods(CoreModManager.java:416)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at net.minecraftforge.fml.relauncher.CoreModManager.hand leLaunch(CoreModManager.java:246)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at net.minecraftforge.fml.relauncher.FMLLaunchHandler.se tupHome(FMLLaunchHandler.java:95)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at net.minecraftforge.fml.relauncher.FMLLaunchHandler.se tupServer(FMLLaunchHandler.java:79)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at net.minecraftforge.fml.relauncher.FMLLaunchHandler.co nfigureForServerLaunch(FMLLaunchHandler.java:39)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at net.minecraftforge.fml.common.launcher.FMLServerTweak er.injectIntoClassLoader(FMLServerTweaker.java:43)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at net.minecraft.launchwrapper.Launch.launch(Launch.java :115)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at net.minecraft.launchwrapper.Launch.main(Launch.java:2 8)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native M ethod)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMet hodAccessorImpl.java:57)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(Deleg atingMethodAccessorImpl.java:43)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at java.lang.reflect.Method.invoke(Method.java:606)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at net.minecraftforge.fml.relauncher.ServerLaunchWrapper .run(ServerLaunchWrapper.java:43)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHan dler:setupHome:99]: at net.minecraftforge.fml.relauncher.ServerLaunchWrapper .main(ServerLaunchWrapper.java:12)
[23:12:49] [main/ERROR] [FML]: An error occurred trying to configure the minecra ft home at /home/ec2-user/MinecraftServer/. for Forge Mod Loader
java.lang.UnsupportedClassVersionError: net/darkhax/bookshelf/asm/BookshelfLoadi ngPlugin : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_121]
at java.lang.ClassLoader.defineClass(ClassLoader.java:803) ~[?:1.7.0_121 ]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:14 2) ~[?:1.7.0_121]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:442) ~[?:1.7. 0_121]
at java.net.URLClassLoader.access$100(URLClassLoader.java:64) ~[?:1.7.0_ 121]
at java.net.URLClassLoader$1.run(URLClassLoader.java:354) ~[?:1.7.0_121]
at java.net.URLClassLoader$1.run(URLClassLoader.java:348) ~[?:1.7.0_121]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.7.0_ 121]
at java.net.URLClassLoader.findClass(URLClassLoader.java:347) ~[?:1.7.0_ 121]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLo ader.java:117) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[?:1.7.0_121]
at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[?:1.7.0_121]
at java.lang.Class.forName0(Native Method) ~[?:1.7.0_121]
at java.lang.Class.forName(Class.java:278) ~[?:1.7.0_121]
at net.minecraftforge.fml.relauncher.CoreModManager.loadCoreMod(CoreModM anager.java:536) ~[forge-1.8.9-11.15.1.1761-universal.jar:?]
at net.minecraftforge.fml.relauncher.CoreModManager.discoverCoreMods(Cor eModManager.java:416) ~[forge-1.8.9-11.15.1.1761-universal.jar:?]
at net.minecraftforge.fml.relauncher.CoreModManager.handleLaunch(CoreMod Manager.java:246) ~[forge-1.8.9-11.15.1.1761-universal.jar:?]
at net.minecraftforge.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunc hHandler.java:95) [forge-1.8.9-11.15.1.1761-universal.jar:?]
at net.minecraftforge.fml.relauncher.FMLLaunchHandler.setupServer(FMLLau nchHandler.java:79) [forge-1.8.9-11.15.1.1761-universal.jar:?]
at net.minecraftforge.fml.relauncher.FMLLaunchHandler.configureForServer Launch(FMLLaunchHandler.java:39) [forge-1.8.9-11.15.1.1761-universal.jar:?]
at net.minecraftforge.fml.common.launcher.FMLServerTweaker.injectIntoCla ssLoader(FMLServerTweaker.java:43) [forge-1.8.9-11.15.1.1761-universal.jar:?]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [launchwra pper-1.12.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrappe r-1.12.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0 _121]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:57) ~[?:1.7.0_121]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:43) ~[?:1.7.0_121]
at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_121]
at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunc hWrapper.java:43) [forge-1.8.9-11.15.1.1761-universal.jar:?]
at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaun chWrapper.java:12) [forge-1.8.9-11.15.1.1761-universal.jar:?]
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:main:12]: java.lang.reflect.InvocationTargetException
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:main:12]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native M ethod)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:main:12]: at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMet hodAccessorImpl.java:57)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:main:12]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(Deleg atingMethodAccessorImpl.java:43)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:main:12]: at java.lang.reflect.Method.invoke(Method.java:606)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:main:12]: at net.minecraftforge.fml.relauncher.ServerLaunchWrapper .run(ServerLaunchWrapper.java:43)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:main:12]: at net.minecraftforge.fml.relauncher.ServerLaunchWrapper .main(ServerLaunchWrapper.java:12)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: Caused by: java.lang.UnsupportedClassVersionError: net/darkhax/ bookshelf/asm/BookshelfLoadingPlugin : Unsupported major.minor version 52.0
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at java.lang.ClassLoader.defineClass1(Native Method)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at java.lang.ClassLoader.defineClass(ClassLoader.java:80 3)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at java.security.SecureClassLoader.defineClass(SecureCla ssLoader.java:142)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at java.net.URLClassLoader.defineClass(URLClassLoader.ja va:442)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at java.net.URLClassLoader.access$100(URLClassLoader.jav a:64)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at java.net.URLClassLoader$1.run(URLClassLoader.java:354 )
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at java.net.URLClassLoader$1.run(URLClassLoader.java:348 )
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at java.security.AccessController.doPrivileged(Native Me thod)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at java.net.URLClassLoader.findClass(URLClassLoader.java :347)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at net.minecraft.launchwrapper.LaunchClassLoader.findCla ss(LaunchClassLoader.java:117)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at java.lang.Class.forName0(Native Method)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at java.lang.Class.forName(Class.java:278)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at net.minecraftforge.fml.relauncher.CoreModManager.load CoreMod(CoreModManager.java:536)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at net.minecraftforge.fml.relauncher.CoreModManager.disc overCoreMods(CoreModManager.java:416)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at net.minecraftforge.fml.relauncher.CoreModManager.hand leLaunch(CoreModManager.java:246)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at net.minecraftforge.fml.relauncher.FMLLaunchHandler.se tupHome(FMLLaunchHandler.java:95)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at net.minecraftforge.fml.relauncher.FMLLaunchHandler.se tupServer(FMLLaunchHandler.java:79)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at net.minecraftforge.fml.relauncher.FMLLaunchHandler.co nfigureForServerLaunch(FMLLaunchHandler.java:39)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at net.minecraftforge.fml.common.launcher.FMLServerTweak er.injectIntoClassLoader(FMLServerTweaker.java:43)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at net.minecraft.launchwrapper.Launch.launch(Launch.java :115)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: at net.minecraft.launchwrapper.Launch.main(Launch.java:2 8)
[23:12:49] [main/INFO] [STDERR]: [net.minecraftforge.fml.relauncher.ServerLaunch Wrapper:run:48]: ... 6 more

Does anyone know how to fix this? I'm using Ubuntu.

Thanks.