Day01-1 Common DOS commands

Source: Internet
Author: User

Computer = hardware + software

Hardware:

Cpu

Computing core and control core in the computer. Responsible for understanding the computer's instructions and the execution of computer operations.

Memory

A bridge between data and CPU interaction. The data required by the program will be loaded into memory first. The CPU directly reads the data in memory for operation.

Features: fast access speed.

Cons: When a power outage or program exits, the data in memory is lost.

HDD (Mechanical hard drive, SSD):

The data can be saved permanently

Disadvantage: Slow access speed

Solid-state drives: very fast reading speed

Software: A collection of computer instructions and data organized in a certain order.

Software = data + instructions

Categories of software:

System software:

Windows,linux,mac Os,ios,andorid

Application software: (Must be based on the system software to use)

QQ, Thunder

The nature of software (what the software solves for us): improves the efficiency of human interaction with computers.

How humans interact with computers:

1. Graphical interface: simple, powerful

2. Through DOS commands

Common DOS commands:

Drive letter:

Enter under the specified disk such as: D:

Folder operations:

Dir

Show files and folders for the current directory

CD path

Enter the specified path

Cd..

Will retire the parent directory

CD \

The root directory in the current directory will be retired

MD + folder name

Create a folder

Rd + folder name

Delete an empty folder Note: cannot be used to delete a non-empty folder

File operation:

echo Data > file name

Create a file and specify the data to write

Type file name

View the specified file contents

del file name

Delete the specified file note: Del followed by a folder, then delete all the files in the folder

*

wildcard character (can match any file name)

tab

Content completion

Cls

Clear Screen

Up and DOWN ARROW keys

Get back the last command you wrote.

Exit

Close the console

Day01-1 Common DOS commands

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