# Page Not Found

The URL `bsd-jia-zu-dao-lun/openbsd-xi-tong-ru-men/zai-shu-mei-pai-shang-an-zhuang-openbsd` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [21.1 安装双系统（先安装 FreeBSD）](https://book.bsdcn.org/di-21-zhang-freebsd-gao-ji-an-zhuang/di-21.1-jie-an-zhuang-shuang-xi-tong-xian-an-zhuang-freebsd.md)
- [21.2 安装双系统（后安装 FreeBSD）](https://book.bsdcn.org/di-21-zhang-freebsd-gao-ji-an-zhuang/di-21.2-jie-an-zhuang-shuang-xi-tong-hou-an-zhuang-freebsd.md)
- [6.3 使用 Hyper-V 安装 FreeBSD](https://book.bsdcn.org/di-6-zhang-xu-ni-hua-ping-tai-an-zhuang-freebsd/di-6.3-jie-shi-yong-hyper-v-an-zhuang-freebsd.md)
- [32.4 在 FreeBSD 上安装 VirtualBox](https://book.bsdcn.org/di-32-zhang-xu-ni-hua-yu-rong-qi-guan-li/di-32.4-jie-zai-freebsd-shang-an-zhuang-virtualbox.md)
- [5.3 安装故障排除](https://book.bsdcn.org/di-5-zhang-freebsd-an-zhuang-ji-chu/di-5.3-jie-an-zhuang-gu-zhang-pai-chu.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://book.bsdcn.org/di-21-zhang-freebsd-gao-ji-an-zhuang/di-21.1-jie-an-zhuang-shuang-xi-tong-xian-an-zhuang-freebsd.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

### Option 2 — Browse the documentation index

Full index: https://book.bsdcn.org/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://book.bsdcn.org/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/di-21-zhang-freebsd-gao-ji-an-zhuang/di-21.1-jie-an-zhuang-shuang-xi-tong-xian-an-zhuang-freebsd.md`).

You may also use `Accept: text/markdown` header for content negotiation.