CMD and NPM basic commands

One ,cmd command

CMD A command is a command prompt ,CMD yes command Abbreviation .

1. Press... On the keyboard at the same time window+r Open the following operation window

2. Input cmd Press enter to enter the console

3. Switch disks

Enter the name of the disk , Add a colon to the back , Such as D:     From c Disk switch to d Dish up

 4.cd command

cd Directory name Switch to the corresponding directory
cd ../ Switch to the previous Directory
cd / Switch to the root directory
cd Users Switch to Users Catalog
cd Users\Administrator Switch to Users\Administrator Catalog

5. View directory

dir It is used to view the contents of the current directory

 6. Create directory

md+ Directory name , Create a new directory

7. Delete directory

rd+ Directory name , Delete empty directory

rd+ Directory name /s/q, Delete content with content

8.help

Input help Command to view all instructions

help + command , You can check the usage of this command

9.type, View the contents of the text file

10.del, Delete file

11.cls, Clear the screen

12.ipconfig, View this machine ip

13.ping Host name , View Unicom

14.calc, Turn on the calculator

Two 、npm command

1. initialization

npm init Initialize project , establish package.json The file of （ All options yes that will do ）

2. Catalog explanation

package.json  Project package management documents

package-lock.json  Download cache address

node_modules  Where to download the installation package

3. install

（1） General installation npm install jquery(install I could just write it as i)

（2） Global installation , Any project on the computer can refer to the installed plug-ins

Global installation vue    npm i @vue/cli -g

（3） Development dependent installation , The installed plug-ins are used in the project development stage , After the project goes online, you don't need

install axios     npm i axios -d

（4） The product environment depends on installation , The installed plug-ins need to be reopened and online

install jquery  npm i jquery -s

4. uninstall

npm uninstall jquery

5. to update

npm update jquery