> 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/pt-br/hacking-tools/calculators.md).

# Calculadoras

Central prática de calculadoras para subnetting, permissões no Linux e expressões cron usando tabelas pesquisáveis do GitBook e notas rápidas de triagem.

Esta seção reúne calculadoras de consulta rápida para tarefas comuns de pentest e administração. Cada página usa tabelas pesquisáveis do GitBook, então você pode digitar o valor de que precisa e ir diretamente ao resultado.

## Índice de Calculadoras

<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:$primary;">:network-wired:</i></h3></td><td><h4>Calculadora de Sub-redes</h4></td><td>Pesquise intervalos CIDR, máscaras de sub-rede, máscaras wildcard, contagem de hosts, tamanho do bloco e exemplos de subnetting.</td><td><a href="/pt-br/hacking-tools/calculators/subnetting-calculator.md">Calculadora de Subnetting</a></td></tr><tr><td><h3><i class="fa-key" style="color:$primary;">:key:</i></h3></td><td><h4>Calculadora de Permissões do Linux</h4></td><td>Converta permissões octais para notação simbólica, revise bits SUID/SGID/sticky e identifique o impacto na escalada de privilégios.</td><td><a href="/pt-br/privesc/permissions/linux-permissions-calculator.md">Calculadora de permissões do Linux</a></td></tr><tr><td><h3><i class="fa-clock" style="color:$primary;">:clock:</i></h3></td><td><h4>Calculadora de Expressão Cron</h4></td><td>Pesquise expressões cron comuns, leia seu significado em linguagem humana e revise verificações de escalada de privilégios via cron.</td><td><a href="/pt-br/privesc/cron-jobs/cron-expression-calculator.md">Calculadora de expressões cron</a></td></tr></tbody></table>

## Uso Rápido

| Precisa                             | Pesquisar por                         |
| ----------------------------------- | ------------------------------------- |
| Máscara de rede e contagem de hosts | `/24`, `/27`, `/30`                   |
| Conversão de permissões do Linux    | `755`, `644`, `4755`, `rwxr-xr-x`     |
| Significado da agenda cron          | `*/5 * * * *`, `0 0 * * *`, `@reboot` |


---

# 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 by asking a question.

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

```
GET https://hacking-notes.jord4n.pro/pt-br/hacking-tools/calculators.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.

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.