Master Docker Basics: From Containers to Cloud‑Native Deployment

Docker is an open‑source container platform whose core concept is packaging an application and all its dependencies (code, environment, configuration, etc.) into a standard “image”. This image can run in any environment where Docker is installed, creating isolated “containers”.

It achieves “build once, run anywhere”, guaranteeing absolute consistency from development to production and greatly improving deployment efficiency. Compared with traditional virtual machines, Docker containers start faster, consume fewer resources, and provide better isolation.

Today Docker has become the cornerstone of cloud‑native, microservices, and DevOps, a core skill for modern IT professionals.

Lightweight container technology also enables efficient deployment of deep‑learning models by packaging the model and its runtime environment into a portable container, simplifying the deployment workflow.

Container Overview

Linux containers isolate a set of processes from the rest of the system, running from a separate image that provides all required files. The container image includes all application dependencies, ensuring portability and consistency throughout development, testing, and production.

What is a Linux container?

Is a container the same as virtualization?

A brief history of container development

What is Docker?

Docker lets you treat containers as lightweight, modular virtual machines, offering high flexibility for creating, deploying, and migrating containers across environments.

How does Docker work?

Is Docker technology the same as traditional Linux containers?

Docker’s objectives

Basic Docker Commands

Docker basic command operations

Launching the first container

Docker image lifecycle

Docker Image Operations

Search official repository images

Pull images

Export images

Delete images

Import images

View detailed image information

Daily Container Management

Start/stop containers

Methods to enter a container

Delete all containers

Port mapping during startup

Docker Volume Management

Create a volume when mounting

Mount after creating a volume

Manually save a container as an image