SomePerson

It's hardly safe but I changed the USERNAME in the script to root to force it to accept me as root, that works. Just a note to anyone with a similar problem, I really would not recommend changing the username to root, it's pretty stupid and leaves your server vulnerable, this turned out to be a permissions problem so I just used the chown command to recursively set all of my minecraft folder back to my minecraft user account (not sure why it changed to begin with but there it is) Thanks havocx42, Cheap Shot and kyneff for your fast replies.

Ok, the server script seems to be the problem. I stopped the server and ran the command "java -Xmx1536M -Xms1536M -jar Tekkit.jar nogui" (Had to customize the memory allocation) and it works, it loads everything without a problem, now I just need to dig around that stupid script and find out why it didn't do what it was supposed to, I even changed the INVOCATION line to that command. Strange...

I have a server startup script in my init.d directory which I access to start and stop the server etc. I used this script: http://www.minecraftwiki.net/wiki/Server_startup_script with it pointing to Tekkit.jar instead. The server works well if I remove Equivalent Exchange from the mods folder so i'm not sure if it's a problem with paths, I could be wrong though.

Yep everything 64 bit.

The log was taken from server.log, i've done a complete reinstall of the server from scratch with a fresh download and I have now even done a completely fresh reinstall of the client (deleted the .techniclauncher folder and redownloaded) sadly it still shows that error.

Sorry about that Cheap Shot, updated original post to the proper structure... i think

Ok i'll fix it, thanks kyneff

This has been driving me crazy, when I start Tekkit.jar I have a problem with mod_ee.class not loading. Launcher/pack Version: Tekkit 2.1 Server (Using "always use development builds" option in launcher) Operating System: Debian Version of Java: 7 Description of Problem: Equivalent Exhange crashes the server, not really sure what else to say. It's a very odd problem. Error Messages: [FINE] Failed to load mod from "mod_EE.class" Link to pastebin of log: http://pastebin.com/hXPcd8F5