Elephant454

Yes! I managed to get it to work after installing JRE in the same way. Thank you so much for your very quick responses! I'm very excited to get to work. I'm marking this thread as solved. Edit: One last question. How do I mark this thread as solved?

The java command does indeed work. I followed this tutorial to install JDK: http://www.wikihow.com/Install-Oracle-Java-JDK-on-Ubuntu-Linux. Now I am not getting the previous error, but instead I am getting == MCP 8.04 (data: 8.04, client: 1.6.2, server: 1.6.2) == "scalac" is not found on the PATH. Scala files will not be recompiled !! retroguard check FAILED !! Command '"java" -jar runtime/bin/retroguard.jar --version' returned non-zero exit status 2 Any ideas?

I tried to run ~/MCP/jars/forge/install.sh (I'm trying to give an idea of how the folders are setup, in case that is part of the problem), and everything worked out fine until I was greeted with the following error: FATAL ERROR Traceback (most recent call last): File "/home/matthew/downloads/MCP/jars/forge/mcp/runtime/decompile.py", line 136, in decompile keep_lvt=keep_lvt, keep_generics=keep_generics, force_rg=force_rg) File "/home/matthew/downloads/MCP/jars/forge/mcp/runtime/mcp.py", line 34, in decompile_side commands.applyss(side, keep_lvt=keep_lvt, keep_generics=keep_generics) File "/home/matthew/downloads/MCP/jars/forge/fml/fml.py", line 943, in applyss_shunt transformers_hook(self, side) File "/home/matthew/downloads/MCP/jars/forge/fml/fml.py", line 1001, in transformers_hook apply_ats(fml_dir, mcp_dir, class_path, jars[side], disable_at=disable_at, commands=self) File "/home/matthew/downloads/MCP/jars/forge/fml/fml.py", line 1300, in apply_ats cmds = find_java() File "/home/matthew/downloads/MCP/jars/forge/fml/fml.py", line 651, in find_java if (runcmd('javac -version')): File "/home/matthew/downloads/MCP/jars/forge/fml/fml.py", line 373, in runcmd process = subprocess.Popen(forklist, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, bufsize=-1) File "/usr/lib/python2.7/subprocess.py", line 679, in __init__ errread, errwrite) File "/usr/lib/python2.7/subprocess.py", line 1259, in _execute_child raise child_exception I'm not sure what to do here. I am running CrunchBang Linux. I don't know how to install JDK properly, and I'm not sure if it is properly installed or not. The javac command doesn't work, but I have JDK 7 located in /usr/local/bin. Any ideas of what to do?