Installing Linux systems theory +

Installing Linux systems theory +

What is the Linux system:

1. Linux is a free to use and free dissemination of Unix-like operating system, is based on POSIX and Unix multi-user, multi-tasking, multi-threading and multi-CPU support for the operating system. With the development of the Internet, Linux is supported by software enthusiasts from around the world, organizations, companies. In addition it maintained a strong momentum of development in server operating systems other than on personal computers, embedded systems have made great progress. Not only can users intuitive access to the implementation mechanism of the operating system, but can be modified to improve the operating system according to their needs, to maximize meet the needs of users.
2. Not only Linux system performance and stability, and is open source software. The core components of firewall performance and efficient, simple configuration, to ensure the safety of the system. In many enterprise networks, in pursuit of speed and security, Linux as a server operating system is not just use the network operation and maintenance personnel, either as a Linux server, but also can be used as a network firewall is a major highlight of Linux.
3. Compared with other operating systems Linux, an open-source, no copyright, technical community of users and more features, open source allows the user to cut free, highly flexible, powerful and low cost. In particular, an embedded system network protocol stack, can be achieved through the proper configuration of router functions. These features make Linux an ideal development platform for the development of routing and switching equipment.

   Acquaintance Linux system

   Linux System Components contents:
   Linux kernel
   various peripheral programs: Desktop Network. Peripheral program written in C ++
   
   kernel: Very little about 200MB, mainly external instruction translation, translated into commands to operate the hardware. Kernel-level translator is the system
   kernel written in C language process-oriented language
   attached: Python object-oriented but also process-oriented language

   Then we started the installation of the image file CentOS 7:

   CentOS software can be downloaded on the official website: https://www.centos.org/

   The following experiments we will adopt a virtual machine after installing the system, making it available on the Internet.

   Here we use a virtual machine VMare installation.

   First, open the Vmare

   
   
   
   
   
   
   
   

   Here high students can choose 4GB memory configuration

   
   
   
   
   

   Here disk space to 40GB, or even higher, because the installation file size, as well as to facilitate the use of the latter.

   
   
   
   
   
   

   At this time, by controlling the arrow keys, select the first, the transport

   
   
   
   
   
   
   
   
   
   
   
   
   
   

   Click Start Installation

   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   At this point we log off, enter the root account so they can use the administrator privileges.

   
   
   
   
   
   

   After opening the browser we can not find online, this time we begin configuration. Make access to the Internet.

   
   

   Input command vim / etc / sysconfig / network-scripts / ifcfg-ens33

   

   After entering the interface, still using the arrow keys to control, at last find onboot, then click on the keyboard i key to enter edit mode, change the yes to no

   

   When you're finished, press the esc key to exit edit mode and command mode

   

   Now enter: then enter wq! Press Enter to go out.

   

   Opens to see if the network connectivity

   

   Experiment was a success!