# Page Not Found

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## Suggested Pages

You may be looking for one of the following:
- [15.2 使用源代码更新 FreeBSD](https://book.bsdcn.org/di-15-zhang-freebsd-xi-tong-geng-xin/di-15.2-jie-shi-yong-yuan-dai-ma-geng-xin-freebsd.md)
- [15.1 使用 freebsd-update 更新 FreeBSD](https://book.bsdcn.org/di-15-zhang-freebsd-xi-tong-geng-xin/di-15.1-jie-shi-yong-freebsd-update-geng-xin-freebsd.md)
- [15.3 使用 PkgBase 更新基本系统](https://book.bsdcn.org/di-15-zhang-freebsd-xi-tong-geng-xin/di-15.3-jie-shi-yong-pkgbase-geng-xin-ji-ben-xi-tong.md)
- [15.4 通过 ZFS 启动环境实现多版本共存](https://book.bsdcn.org/di-15-zhang-freebsd-xi-tong-geng-xin/di-15.4-jie-tong-guo-zfs-qi-dong-huan-jing-shi-xian-duo-ban-ben-gong-cun.md)
- [24.3 使用 IDA Pro 调试 FreeBSD](https://book.bsdcn.org/di-24-zhang-kai-fa-gong-ju/di-24.3-jie-shi-yong-ida-pro-tiao-shi-freebsd.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 documentation index with the `ask` parameter:

```
GET https://book.bsdcn.org/di-15-zhang-freebsd-xi-tong-geng-xin/di-15.2-jie-shi-yong-yuan-dai-ma-geng-xin-freebsd.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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-15-zhang-freebsd-xi-tong-geng-xin/di-15.2-jie-shi-yong-yuan-dai-ma-geng-xin-freebsd.md`).

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