# 使用管線

## 把網頁轉成純文字

sudo apt install html2text curl

```bash
curl -sL https://www.techbang.com/posts/74989-color-e-reader-is-coming-e-ink-meta-tai-printed-color-electronic-paper-products-2020-debut?from=home_news | html2text -utf8 -o myfile.txt
```

## 查天氣 weather-util + grep

sudo apt install weather-util

weather-util search Tainan | grep -A 10 'Taiwan (RCNN)'

```bash
weather-util search Tainan | grep -A 10 'Taiwan (RCNN)'
Current conditions at Tainan Tw-Afb , Taiwan (RCNN) 22-57N 120-12E 16M
Last updated Dec 15, 2019 - 06:30 AM EST / 2019.12.15 1130 UTC
   Temperature: 69 F (21 C)
   Relative Humidity: 68%
   Wind: from the N (010 degrees) at 6 MPH (5 KT)
   Sky conditions: mostly clear

```


---

# Agent Instructions: 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:

```
GET https://kawsing.gitbook.io/opensystem/andoid-shou-ji/untitled-4/linux-cli/shi-yong-guan-xian-curl-+-html2text.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.

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.