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Updating esxi server

VMware ESXi (formerly ESX) is an enterprise-class, type-1 hypervisor developed by VMware for deploying and serving virtual computers.

As a type-1 hypervisor, ESXi is not a software application that is installed on an operating system (OS); instead, it includes and integrates vital OS components, such as a kernel.

This is enough to get the boot going but the boot crashes out pretty quickly.ESX uses a Linux kernel to load additional code: often referred to by VMware, Inc. The dependencies between the "vmkernel" and the Linux part of the ESX server have changed drastically over different major versions of the software.The VMware FAQ states: "ESX Server also incorporates a service console based on a Linux 2.4 kernel that is used to boot the ESX Server virtualization layer".In general, this Service Console provides management interfaces (CLI, webpage MUI, Remote Console).As a further detail which differentiates the ESX from other VMware virtualization products: ESX supports the VMware proprietary cluster file system VMFS.After version 4.1 (released in 2010), VMware renamed ESX to ESXi.ESXi replaces Service Console (a rudimentary operating system) with a more closely integrated OS.In traditional systems, a given operating system runs a single kernel.The VMware FAQ mentions that ESX has both a Linux 2.4 kernel and vmkernel – hence confusion over whether ESX has a Linux base.with three interfaces: hardware, guest systems, and the service console (Console OS).The vmkernel handles CPU and memory directly, using scan-before-execution (SBE) to handle special or privileged CPU instructions Access to other hardware (such as network or storage devices) takes place using modules.

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