> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/zh/hacking-tools/calculators.md).

# 计算器

本节汇总了常见渗透测试和管理任务的快速查询计算器。每个页面都使用可搜索的 GitBook 表格，因此你可以输入所需的值并直接跳转到结果。

## 计算器索引

<table data-view="cards" data-full-width="false" data-search="true"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><h3><i class="fa-network-wired" style="color:$primary;">:network-wired:</i></h3></td><td><h4>子网划分计算器</h4></td><td>搜索 CIDR 范围、子网掩码、通配符掩码、主机数量、块大小以及子网划分示例。</td><td><a href="/pages/ccfb41854ac93e6cf1649b27f5db36fddf323f1a">/pages/ccfb41854ac93e6cf1649b27f5db36fddf323f1a</a></td></tr><tr><td><h3><i class="fa-key" style="color:$primary;">:key:</i></h3></td><td><h4>Linux 权限计算器</h4></td><td>将八进制权限转换为符号表示，查看 SUID/SGID/粘滞位，并识别提权影响。</td><td><a href="/pages/1d491e49c5a10746048ea03a8e9b94212fbc2afd">/pages/1d491e49c5a10746048ea03a8e9b94212fbc2afd</a></td></tr><tr><td><h3><i class="fa-clock" style="color:$primary;">:clock:</i></h3></td><td><h4>Cron 表达式计算器</h4></td><td>搜索常见的 cron 表达式，阅读其人类可读含义，并查看 cron 提权检查。</td><td><a href="/pages/3c35b6317c0a1ec52fbcabf0385bf6ff401ece43">/pages/3c35b6317c0a1ec52fbcabf0385bf6ff401ece43</a></td></tr></tbody></table>

## 快速用法

| 需要         | 搜索                                    |
| ---------- | ------------------------------------- |
| 网络掩码和主机数量  | `/24`, `/27`, `/30`                   |
| Linux 权限转换 | `755`, `644`, `4755`, `rwxr-xr-x`     |
| cron 计划含义  | `*/5 * * * *`, `0 0 * * *`, `@reboot` |


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# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://hacking-notes.jord4n.pro/zh/hacking-tools/calculators.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.