Abstract
This chapter reviews the tools that come native to all ESX servers. It is important to know how to use these tools from the command line, and how they can be incorporated into scripts. VMware provides some very powerful tools that are built on native Linux functionality, and that are expanded for use within the ESX host and the virtual machines residing on them. Esxtop is a very simple yet powerful tool, which can be used for diagnosing performance issues of the ESX host as well as the virtual machines. In Linux, there exists a comparable command-line tool called Top, which can be used similarly for Linux OSes to gather performance metrics. VMware has expanded Esxtop to provide metrics specific to virtualization. Esxtop provides real-time monitoring of virtual machine processes (also known as worlds). Vmkfstools is a powerful command-line tool that comes native to ESX Server. This tool can create and manipulate VMDK files, performing such tasks as importing and exporting disk files, growing and shrinking existing disk files, and committing REDO files. The tool can also create VMFS partitions, and has a host of other capabilities.
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