The Linux kernel is the primary virtual machine; it is invoked by the service console. At normal run-time, the vmkernel is running on the bare computer, and the Linux-based service console runs as the first virtual machine. VMware dropped development of ESX at version 4.1, and now uses ESXi, which does not include a Linux kernel.
The definition of zen is slang for feeling peaceful and relaxed. An example of zen as an adjective is to have a zen experience, how you feel during a day at the spa. Zen is a type of Buddhism that focuses on awareness through the practice of meditation. An example of Zen is a rock garden that is tended to meditate.
moment of zen. This phrase is mostly commonly found at the end of every broadcast of The Daily Show, with Jon Stewart saying the tag line after the last commercial break, and throwing up a short video clip before the end credits. A moment of Zen is something which inspires in the same reaction as does contemplating Zen koans does. In Zen practice, deliberately irrational statements are sometimes used in Zen to jar persons into realizing the limits of the common uses of the intellect.