1. cmd command line

First open the small black box:

The first step, win key + R key to open the run window

The second step, enter cmd and press Enter

cmd command:

switch drive letter

d: //Enter the d drive

f: //Enter F drive

Switch directory
cd directory address

Create directory
md directory address

Delete directory
rd directory address
rd /s /q silently delete directory and directory address

directory symbol

/ root directory./current
directory ../
upper directory

Help and Tips

help view command
help command view command usage

The first letter + tab prompts the folder of the current directory

↑ Previous command
↓ Next command

Other
ipconfig check ip
ping host/ip check the Unicom status with other hosts and ip
cls clear screen
calc open calculator
ctrl+c end current running command

Two, npm command line

Nodejs-based package management tool (plug-in download tool)

Install nodejs with npm

View version
node -v view node version
npm -v view npm version

initialize project
md mynpm create directory
cd mynpm enter directory
npm init initialize project
npm init -y quick initialize project

Installation abbreviation
i install
-D --save-dev
-S -save
global installation
Through global installation, all projects on the computer can use
npm i package name -g
npm i @vue/cli -g global installation vue scaffolding
to view the global Installation directory
npm root -g
local operation depends on
development and operation requires this package (plugin
npm i package name --save
npm i jquery --save
npm i jquery -S
local development depends on the package (plugin)
only in the development phase
npm i package name --save-dev
npm i less --save-dev
npm i less -D
install multiple
npm i jquery bootatrap -S install the specified version npm i [email protected]

Update
npm update package name
update strategy
^xyz
x broken update (incompatible)
y new features (compatible)
z bug fix
eg: ^2.1.0 update will not exceed or equal to 3.0