---
title: "hello-world (Docker Test Image)"
tags: [docker, test, verification]
date: 2026-04-22
---

# hello-world (Docker 官方测试镜像)

## Definition
hello-world 是 Docker 官方提供的轻量级测试镜像，用于验证 Docker Engine 是否正确安装。运行成功后输出欢迎信息并退出。

## Usage
```bash
# 验证安装（需 sudo）
sudo docker run hello-world

# 无 sudo 验证（用户加入 docker 用户组后）
docker run hello-world
```

## Expected Output
```
Hello from Docker!
This message shows that your installation appears to be working correctly.
...
```

## Related Sources
- [[如何在ubuntu-server安装-docker-docker-compose]] — 安装验证步骤

## Related Concepts
- [[Docker Engine]] — 被验证的核心组件
- [[Docker 用户组]] — 影响非 sudo 运行方式