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my linux version is: Fedora 17
I installed Netbeans IDE 7.1.2 and it was working fine, but now, when I try to open it, nothing happens after double clicking on it.
I think updating the kernel may be the reason, my current kernel version is : 3.4.3
do you know the exact reason and how to solve it?

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I dont think that the problem is the kernel, you should check your JDK version. Try to run netbeans command from command line and post the output.. –  alejo0317 Jul 1 '12 at 17:36
bash: netbeans: command not found... java command is not found too! –  M0εiπ Jul 1 '12 at 18:35
sounds like you did not install java/netbeans into your path, perhaps you did not install them using yum? unfortunately I'm not sure what the canonical way to do this in fedora is. –  xenoterracide Jul 1 '12 at 21:08

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