# Page Not Found

The URL `unix-tong-hen-zhe-shou-ce/di-si-bu-fen-deng-deng/chuang-zao-zhe-cheng-ren-c-he-unix-shi-pian-ju-xin-wen-gao-li-ji-fa-bu` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [15.1 本地化环境变量](https://book.bsdcn.org/di-15-zhang-ben-di-hua-yu-shu-ru-fa/di-15.1-jie-ben-di-hua-huan-jing-bian-liang.md)
- [28.4 强制访问控制框架（MAC 框架）](https://book.bsdcn.org/di-28-zhang-an-quan-shen-ji/di-28.4-jie-qiang-zhi-fang-wen-kong-zhi-kuang-jia-mac-kuang-jia.md)
- [39.1 人工智能术语与概念](https://book.bsdcn.org/di-39-zhang-ren-gong-zhi-neng/di-39.1-jie-ren-gong-zhi-neng-shu-yu-yu-gai-nian.md)
- [20.1 Linux 兼容层架构](https://book.bsdcn.org/di-20-zhang-linux-jian-rong-ceng/di-20.1-jie-linux-jian-rong-ceng-jia-gou.md)
- [34.1 文件传输协议（FTP）概述](https://book.bsdcn.org/di-34-zhang-wen-jian-chuan-shu-xie-yi-ftp/di-34.1-jie-wen-jian-chuan-shu-xie-yi-ftp-gai-shu.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-15-zhang-ben-di-hua-yu-shu-ru-fa/di-15.1-jie-ben-di-hua-huan-jing-bian-liang.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-15-zhang-ben-di-hua-yu-shu-ru-fa/di-15.1-jie-ben-di-hua-huan-jing-bian-liang.md`).

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