Marco Linux notes first day

First day content:

1. Preparation of class environment

2. Basic knowledge of computer and operating system

3. Basic knowledge of computer and operating system 2

4, Linux system installation and preliminary understanding

First, blogging requirements: 5w1h (what,why,who,where,when,how) Clear, appropriate orchestration, user experience

Second, the computer five major parts

CPU (operator + controller), memory (memory), I/O (input, output device)

1. Arithmetic Device

An arithmetic is a part of arithmetic and logic operation.

2. Controller

The controller is the part that realizes each part of the computer and the program executes automatically, its function is to take out the command from memory, produce the control signal, send the instruction to other parts, command the whole operation process. The controller is the center of unified Command and coordination of other components.

Note 1: People often put the operators and controllers together called the central Processing Unit, referred to as the CPU.

3. Memory

Memory is a part of storing information, which is divided into memory and external memory. The memory exchanges information with the operator, input/output device, under the command of the controller. External memory is set for the lack of memory, and under the control of the controller, it exchanges data with the memory in batches.

NOTE 2: The operator, controller, memory of the three are called the host.

4. Input device

an input device is a component that converts data and programs into electrical signals and sends electrical signals into memory. such as: keyboard, mouse, scanner, Mike, game joystick and so on.

5. Output Device

an output device is a component that sends the results of computer processing to a host outside the console. such as: monitors, printers, speakers, etc.

Third, virtual machine creation

CPU Virtualization: Timeshare system, time slice implementation, Memory virtualization: Segment occupancy, I/O device virtualization, network card virtualization;

Create a virtual machine to specify CPU, memory, I/O (disk, Ethercard) process, install OS, disk image file in sparse format (allocate 120G to occupy physical space 20K) and non-sparse format

This article is from the "Liwenjia" blog, please be sure to keep this source http://liwenjia.blog.51cto.com/2656598/1700968

Marco Linux notes first day