Windows 7 pro
Linux-Cent OS 5.8, Fedora 16, Ubuntu12.04
Kernel– In computing, the kernel is the main component of most computer operating systems; it is a bridge between applications and the actual data processing done at the hardware level. The kernel’s responsibilities include managing the system’s resources (the communication between hardware and software components).
How to change to root user on Ubuntu 12.04?
How to stop X on Ubuntu 12.04?
Alt + Ctrl + F1