Management of Linux operating systems (Overview of virtual machines) three

before we first know the operating architecture of the virtual machine, we are beginning to learn linux when, if in our true pc linux The operating system goes up with a KVM virtual machine, but you're sure you want to give up windows OS   so it's easy to get to know when we do experiments. We'll put our linux the operating system obediently installed on the virtual machine.

before using the virtual machine we have to know what the virtual machine is a tool, first in our current X86 platform on each platform can only run one, and now the server is also a lot of this architecture, in the PC running an operating system can better use the resources of the PC , but on the server? Server configuration is generally high so that we can not fully utilize the resources of an operating system, so in order to solve this problem, our great God invented the virtualization of this kind of thing.

What is virtualization? ? The simple point is that on our hardware platform to virtual out of another computer, it can have multiple operating systems on the same hardware platform to run simultaneously, and you can customize the virtual system according to the needs of the hardware configuration, so that our computer can be a lot of fashion with the operating system. Okay, what are we talking about? What is the virtual machine running architecture, one of which is the traditional mode of operation, two is the alien architecture , and three are the native constructs,

First of all, first of all, this pattern is the most common because our computer is the only way to install the operating system is the traditional mode of operation, for example, we are loading PC on the operating system we all put the operating system directly on our hardware, and then install some application software from the operating system, the operating system installed in this mode can only run one operating system at a time. So we do not use the virtual machine, want to install multiple operating systems, then you can only choose to install a dual boot, you want to use which to start which operating system.

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The second thing we're talking about is the alien architecture, which literally means it's not hard to see that an alien is an operation that relies on another operating system to be installed, which is the virtual machine we use, which is installed based on the operating system on our computer. The important thing is that the virtual machine works as an application of the host, and then installs multiple operating systems from the software of the virtual machine, which is suitable for use on our PC , so that we can open a lot of operating systems at once. General our Computer configuration is not high at most at the same time open two to three, the smoothness of the run is to see the true configuration of the computer to determine, although called virtual machine but he these memory, processor, hard disk, network card, and so on are from the real machine, so you should first look at the installation of their own configuration in the plan! If your computer is a server OK, I have no words! 650) this.width=650; "title=" S.png "style=" Float:none "src=" Http://s3.51cto.com/wyfs02/M00/47/11/wKioL1P2Bl_ Qia5caafgdw3hgvk625.jpg "alt=" wkiol1p2bl_qia5caafgdw3hgvk625.jpg "/>

However, if your computer is a server then I do not recommend that you use the above two ways, an operating system can support the hardware resources are limited, there is no objection to this. A windows8.1 Desktop version of the operating system at most is able to support to 8G, More can not be identified. If your computer is a server, the high point of memory can also reach 16G that is, if you want to use the alien architecture of the operation of half of the memory is not used, it is not wasted, so we have a server on a native architecture, This architecture directly installs the virtual machine software directly on the hardware and uses the virtual machine software as the operating system. Of course, just as, it is not the operating system, but he can achieve the same as the operating system of many functions, not only so he can install a number of operating systems on this server, while customizing the configuration requirements for each virtual machine (referred to as virtual machine), his overall structure is shown. 650) this.width=650; "title=" A.png "style=" Float:none "src=" http://s3.51cto.com/wyfs02/M02/47/0F/ Wkiom1p2bufb-wsyaafd6z9gdn4037.jpg "alt=" wkiom1p2bufb-wsyaafd6z9gdn4037.jpg "/>

in our daily life there are people who have heard of virtualization, virtualization is a course, in our Linux On the journey of learning it is only a passer-by, so that in our life on the road to leave a passer-by is not necessarily not important.

In our commonly used virtual machine software there are

Vmware Company's vmwareworkstation , VMware VSphere .

Microsoft Company's Virtual PC , Virtual Server , Hyper-V .

Citrix (Citrix) Company's XenDesktop , XenServer

RedHat (Red Hat) Company's Xen , KVM

generally used virtual machine software VMware Workstation and Red Hat Company's KVM Microsoft has a good virtual machine, but it has a limitation that only Microsoft's operating system can be installed, and no other operating system is supported. Citrix's virtual machine can only say I have less experience, I have no use at all. All right, the virtual machine stuff is going to tell you this, you can leave a message .

next section Linux management of the operating system (installation and use of virtual machines) three

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