DaemonUmbra

Run it from the command line, what does it say?

Forge for 1.12.2 and earlier requires Java 8 specifically. Besides that I’m having a hard time reading the log on mobile but make sure you get the latest version of Java 8 and see if you still get the error.

People are recommending you turn to piracy, great. Are you sure the installer was completely downloaded before you tried to run it?

Remove StorageNetworkAddon, it's broken.

Is this the same 1.6.4 pack I locked your other thread for?

I'm not sure I follow, please describe what you are attempting to do in detail. Are you trying to make a mod by putting files inside a jar?

1.6.4 is no longer supported on this forum due to its age. Please update to a modern version of Minecraft to receive support.

Are you sure your download was complete before you tried to run the file?

Jarm is broken, remove it

You have a very old coremod installed, please make sure every mod you are trying to run is for the version you are running.

Does the console say anything?

Are you running it by typing its name or are you running it with java -jar [filename]?

Check out the StopModReposts site linked in my signature, they explain it better.

Don't use sites like that. Please read my signature for more info.

Where are you getting your mods?

The one that is not the sources jar is the mod, the sources jar would be used by someone wanting to make an addon for your mod

I'm afraid I don't know with the Linux launcher

GitHub's Gist service has a higher max filesize, it requires an account but you can make one for free.

Mods are installed by putting them in .minecraft/mods or wherever you have set your game directory to be in the launcher.

In the future please do not just post massive walls of text like that. You need to set your launcher to launch Forge with Java 8.

build/libs is where your mod comes out, not where you put things in. What programming languages do you know?

Upload it to a site like Pastebin or GitHub Gist, then share the link here

Oh, Windows is hiding the file extensions, it's showing as just "debug" for you but it's actually called debug.log

I'm a bit confused about how you think this works. It sounds like you're under the impression that build/libs is a place where you put things in. Is this correct?