34 lines
825 B
Markdown
34 lines
825 B
Markdown
---
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title: "hello-world (Docker Test Image)"
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tags: [docker, test, verification]
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date: 2026-04-22
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---
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# hello-world (Docker 官方测试镜像)
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## Definition
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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。
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## Usage
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```bash
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# 验证安装（需 sudo）
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sudo docker run hello-world
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# 无 sudo 验证（用户加入 docker 用户组后）
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docker run hello-world
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```
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## Expected Output
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```
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Hello from Docker!
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This message shows that your installation appears to be working correctly.
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...
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```
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## Related Sources
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- [[如何在ubuntu-server安装-docker-docker-compose]] — 安装验证步骤
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## Related Concepts
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- [[Docker Engine]] — 被验证的核心组件
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- [[Docker 用户组]] — 影响非 sudo 运行方式
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