Thanks! 
I am now getting this issue after updating to the latest version (on windows), no problems compiling previously?
Has this been resolved now?
Make sure bash is in your path? What does bash --version say?
ill try this using Ubuntu. Thanks for anyone trying to help me.
running
[root@vps9879 ~]# bash
[root@vps9879 ~]#
just gives me a new line, so it didnt fail
I would recommend starting the bash shell and using it (just run `bash`). If that fails, then bash is not properly installed. If you are actually using bash, and it still doesn't work, then I'm not sure.
So how should i be able to fix this?
If that's all that it output, then it failed on the initial check for bash. That means bash is probably not in the $PATH.
[root@vps9879 ~]# cd /home/Minecraft/Desktop/BuildTools
[root@vps9879 BuildTools]# java -jar BuildTools.jar
You must run this jar through bash (msysgit)
[root@vps9879 BuildTools]#
That's the only output? There should be much more, you should pastebin the entire output, otherwise we really can't help.
Yes. its installed.
Paket bash-4.1.2-29.el6.x86_64 ist bereits in der neusten Version installiert.
Nichts zu tun
Translation:
Packet bash-4.1.2-29.el6.x86_64 is already installed and up to date.
Nothing to do
Do you have bash installed on your CentOS box? Note it must be bash, not another shell.