Sand Box:)

sudo yum install make automake gcc gcc-c++ kernel-devel or BIG change sudo yum groupinstall "Development Tools" yum install kernel-devel kernel-headers ref (http://www.fedoraforum.org/forum/showthread.php?t=198819)

>> sudo /etc/init.d/vboxadd setup or Do this first >> sudo apt-get install dkms build-essential linux-headers-generic then >> sudo /etc/init.d/vboxadd setup and restart vm

I'm already install virtualbox and happy with it, but some bad accident I damnly install kvm for unknown purpose! and I dont wanna use it , then I sweetly go back to virtualbox , So sadly it shout at me by 'something not work with kvm and you need to recomplie kernel.......' and dont work for me, ..... here is solution!!! >>> modprobe -r kvm_intel from Munzir Taha (https://bugs.launchpad.net/ubuntu/+source/virtualbox-ose/+bug/292588) Very Thank

Aha I'm back. This is about openning virbox instance by commandline. So if you have it(Virtualbox) installed in your machine then >>> VBoxManage list (it show your instance's list) and then >>>VBoxManage startvm your-instance-name or your-instance-uid