# Page Not Found

The URL `files/7iukwSfSgZFb5PVYm8nJ` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [Sequencing chemistry explained by Illumina](https://nks.gitbook.io/rna-seq/2.-getting-started/sequencing-chemistry-explained-by-illumina.md)
- [Salmon](https://nks.gitbook.io/rna-seq/6.-mapping-alignment-and-quantification/salmon.md)
- [Linux environment](https://nks.gitbook.io/rna-seq/4.-setting-up-terminal/linux-environment.md)
- [(optional) My click moment about "Why Linux"](https://nks.gitbook.io/rna-seq/2.-getting-started/optional-my-click-moment-about-why-linux.md)
- [Getting FASTQ files from online database](https://nks.gitbook.io/rna-seq/5.-fastq-and-quality-control/getting-fastq-files-from-online-database.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://nks.gitbook.io/rna-seq/2.-getting-started/sequencing-chemistry-explained-by-illumina.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://nks.gitbook.io/rna-seq/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://nks.gitbook.io/rna-seq/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., `/rna-seq/2.-getting-started/sequencing-chemistry-explained-by-illumina.md`).

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