What is angular CLI?

The Angular CLI is a command-line interface tool that you use to initialize, develop, scaffold, and maintain Angular applications. You can use the tool directly in a command shell, or indirectly through an interactive UI such as Angular Console.

Angular CLI Commands:
Below list is taken from Angular official website( https://angular.io/cli)

To learn more on angular use:  https://angular.io/guide/quickstart

COMMAND	ALIAS	DESCRIPTION
add		Adds support for an external library to your project.
build	b	Compiles an Angular app into an output directory named dist/ at the given output path. Must be executed from within a workspace directory.
config		Retrieves or sets Angular configuration values in the angular.json file for the workspace.
doc	d	Opens the official Angular documentation (angular.io) in a browser, and searches for a given keyword.
e2e	e	Builds and serves an Angular app, then runs end-to-end tests using Protractor.
generate	g	Generates and/or modifies files based on a schematic.
help		Lists available commands and their short descriptions.
lint	l	Runs linting tools on Angular app code in a given project folder.
new	n	Creates a new workspace and an initial Angular app.
run		Runs an Architect target with an optional custom builder configuration defined in your project.
serve	s	Builds and serves your app, rebuilding on file changes.
test	t	Runs unit tests in a project.
update		Updates your application and its dependencies. See https://update.angular.io/
version	v	Outputs Angular CLI version.
xi18n		Extracts i18n messages from source code.