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System Requirements. In this video we'll review the minimum system requirements for Linux based on two distributions commonly used when the Linux+ objectives were developed in 2009. These distributions are the Hardy Heron release of Ubuntu Linux released in April of 2008 and well sort of Red Hat Enterprise Linux 5, released in 2007, I say sort of Red Hat Enterprise Linux 5 as I use CentOS 5, actually 5.3, which is based on the exact - I repeat - exact same source code as is used by Red Hat. I use examples in this course based on CentOS 5 and Ubuntu as both distributions do not require any subscription fees and are fairly popular in the Linux world. Given today's computer hardware the minimum requirements for these distributions seem trivial until you realize the number of installations being created on virtual machines. If you're told to configure 32 virtual machines on a server, gigabytes of RAM no longer seem like a lot of memory. The minimum hardware requirement for installation of these distributions in text mode is 64 Megabytes, actually 32 Megabytes on Ubuntu but that's really a little light. More is required for the actual Operating System. I prefer at least 128 Megabytes on systems where the GUI is not installed or at least 256 Megabytes of RAM if you're including a GUI. As for hard drive space you should generally have at least 4 Gigabytes available. If you're installing everything from Ubuntu or CentOS you may need 10 or 20 Gigabytes. For this course I've created both Ubuntu and CentOS systems on VMware virtual machines. On a virtual machine I can test things out and not affect my regular system. For myself I use VMware Server. It's available from www.vmware.com. VMware Server is, in my opinion, the best "free option" for this course. When I prepare for certification exams I use VMware Server and install the operating system I need on that virtual machine. It supports relatively easy installations of various operating systems hosted on a variety of Linux distributions or even Microsoft Windows. It supports snapshots. If I change too many things and can't remember what I did I can easily restore the original configuration through the snapshot. Alternatives to VMware Server include Parallels or VMware Fusion if you have a Macintosh system. If you're really focused on Open Source you may want to try KVM, the Kernel-based Virtual Machine on Linux but that requires suitable hardware which goes beyond the scope of this course. It's functionally similar to Xen, which also requires such suitable hardware, also known as "hardware virtualization." Another open source option was developed by Sun Microsoft Systems, also known as Virtualbox, Open Source Edition. It's available from the Sun website as well as from the Ubuntu Universe repository. Well, that's the scoop on System Requirements. Thank you and on to the main tutorials.