Linux Servers and Kernel Virtual Machines

The world of computer machinery is a vast and ever evolving medium that can be both simple and complex based on the subject. Two such subjects are Servers and Virtual Machines, specifically Kernel Virtual Machines. “In computing, a server is a computer program or a device that provides functionality for other programs or devices called clients. This architecture is called the client–server model and a single overall computation is distributed across multiple processes or devices. Servers can provide various functionalities often called “services” such as sharing data or resources among multiple clients or performing computation for a client. A single server can serve multiple clients and a single client can use multiple servers. (Wikipedia Servers Computers3, Aug 16).

A good example of a server can be run on the Linux operating system. With Servers also comes virtual machines that assist in running even more servers. A virtual machine is a software based computer that, like a physical computer, runs an operating system and applications. The virtual machine is comprised of a set of specification and configuration files and is backed by the physical resources of a host machine. Every virtual machine has virtual devices that provide the same functionality as physical hardware and have additional benefits in terms of portability, manageability, and security.

“Just like Windows XP, Windows 7, Windows 8, and Mac OS X, Linux is an operating system. An operating system is software that manages all of the hardware resources associated with your desktop or laptop and with Linux comes Linux Servers such as Ubuntu Server, Slackware, and Gentoo.” (Beal Vangie Aug 2016). “A Linux server is a high-powered variant of the Linux open source operating system that’s designed to handle the more demanding needs of business applications such as network and system administration, database management, and Web services. Linux servers are frequently selected over other server operating systems for their stability, security, and flexibility advantages.” (Beal Vangie Aug 2016).  Not to mention, most Linux servers are free to use! Specifically, one Linux serve, the Ubuntu server, “…is a free software that is a Linux operating system and is used for distribution for personal computers, smartphones, and network servers. Ubuntu server uses Unity as its default user interface. (“Ubuntu” Wikipedia, Aug 2016). A cool feature that Ubuntu had is its unique security tactics to ensure no damage happens to the OS such as limiting administrator privileges and locking access to the main administrator account to prevent any severe damages to the OS and other user accounts.

Now on the subject of Kernel Virtual Machines, they are “a full virtualization solution for Linux on x86 hardware containing virtualization extensions like Intel VT or AMD-V. It consists of a loadable kernel module named KVM. KO that provides the core virtualization infrastructure and a processor specific module, KVM-intel, KO, or KVM-AMD.KO. Using KVM a person can run multiple virtual machines running unmodified Linux or Windows images. Each virtual machine has private virtualized hardware: a network card, disk, graphics adapter, and more. With KVM’s also comes KVM unit tests that are tiny guest operating systems that generally execute only tens of lines of C and assembler test code in order to obtain its PASS/FAIL result. Unit tests provide KVM and virtual hardware functional testing by targeting the features through minimal implementations of their use per the hardware specification. The simplicity of unit tests makes them easy to verify they are correct, easy to maintain, and easy to use in timing measurements. Unit tests are also often used for quick and dirty bug reproducers.” (MediaWiki, Aug 2016).

In short the technology universe is vast and ever expanding with technology gaining knowledge and becoming more powerful with each passing second with more powerful hardware that is able to run different Operating systems on one hardware and Servers that are able to perform different types of services to millions of people for an extended period of time. The Linux OS software is a powerful OS that can house different OS’s one piece of hardware such as the Ubuntu OS. The Ubuntu Linux Based server is an excellent example of a OS because it was made to be “out of the box” and this signifies the evolution of technology. Servers also play a crucial role on how powerful technology has become. Servers find themselves being used for different objectives and purposes.  Servers can sometimes manage data and transfer data securely, run online gaming, host websites and more.  Servers are a fundamental part to the world wide web and without them, it would be hard to get anything done by a multitude of people at once. Without these genius advances in technology, the internet today would never be the same.

 

Written By,

Erick Walker

Works Cited

Beal Vangie, Linux server, Webopedia, Quinstreet Enterprise, Web 2 August 2016.

“Ubuntu” Wikipedia: The Free Encyclopedia. Wikimedia Foundation, Inc. 30 July 2016, Web. 8 Aug 2016.

Rouse Margaret, Virtual Machine, searchservervirtualization, TechTarget, Jul 2016 Web 8 Aug 2016.

MediaWiki, Kernel Virtual Machine ,http://www.lHYPERLINK “http://www.linux-kvm.org/page/Main_Page”iHYPERLINK “http://www.linux-kvm.org/page/Main_Page”nux-kvm.org/page/Main_Page. Web 2 Aug 2016

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