# zettel > zettel is a repository knowledge base of linked markdown notes with provenance for each span of text. Each link below opens a page's Markdown twin. Diátaxis sections are Tutorials, Reference, and Optional; Optional holds explanation pages and may be skipped. Installation packages are Homebrew `cjohnhanson/tap/zettel`, crate `zttl`, PyPI `zttl`, and npm `@cjohnhanson/zttl`. ## Tutorials - [Getting started with Zettel](https://zettel.eng.rip/getting-started.md): Initialize a knowledge base, create notes, link them, and explore the graph ## Reference - [zettel CLI reference](https://zettel.eng.rip/cli-reference.md): Complete command reference for the zettel knowledge base ## Optional - [What is Zettel?](https://zettel.eng.rip/what-is-zettel.md): Zettelkasten knowledge management in frontmattered markdown files tracked by git