Angular CLI allows us to generate components, services, directives, routes, pipes, and many more with ng generate. Here is how you would generate a component:

ng generate component path/name

For example, if we run the following command:

ng generate component shared/message

Four files will be generated and one updated. The produced output will be:

installing component
  create src/app/shared/message/message.component.scss
  create src/app/shared/message/message.component.html
  create src/app/shared/message/message.component.spec.ts
  create src/app/shared/message/message.component.ts
  update src/app/app.module.ts 

The new component is registered in app.module.ts automatically. The generation of other scaffoldings is identical. For example, to generate a service, run this command:

ng generate service path/name

There are plenty of useful options. You can set, for example, --spec=false to skip test file generation.