---
title: Notebooks
description: Use notebooks to build and annotate processes and data flows for time series data.
url: https://docs.influxdata.com/influxdb/v2/tools/notebooks/
estimated_tokens: 618
product: InfluxDB OSS v2
version: v2
---

# Notebooks

This page documents an earlier version of InfluxDB OSS. [InfluxDB 3 Core](/influxdb3/core/) is the latest stable version.

#### API token hashing is enabled by default in InfluxDB OSS 2.9.0

Stronger token security: tokens are stored as hashes on disk, so a copy of the database file doesn’t expose usable tokens. Existing tokens are hashed on first startup and the original strings can’t be recovered afterward — **capture any plaintext tokens you still need before you upgrade**.

For more information, see [Token hashing](/influxdb/v2/admin/tokens/#token-hashing).

Notebooks are a way to build and annotate processes and data flows for time series data. Notebooks include cells and controls to transform the data in your bucket and other countless possibilities.

To learn how to use notebooks, check out the following articles:

### [Overview of notebooks](/influxdb/v2/tools/notebooks/overview/)

Learn about the building blocks of a notebook.

### [Create a notebook](/influxdb/v2/tools/notebooks/create-notebook/)

Create a notebook to explore, visualize, and process your data.

### [Manage notebooks](/influxdb/v2/tools/notebooks/manage-notebooks/)

View, update, and delete notebooks.

### [Downsample data with notebooks](/influxdb/v2/tools/notebooks/downsample/)

Create a notebook to downsample data. Downsampling aggregates or summarizes data within specified time intervals, reducing the overall disk usage as data collects over time.

### [Normalize data with notebooks](/influxdb/v2/tools/notebooks/clean-data/)

Learn how to create a notebook that normalizes or cleans data to make it easier to work with.

### [Troubleshoot notebooks](/influxdb/v2/tools/notebooks/troubleshoot-notebooks/)

Common issues with the notebooks feature.

[notebooks](/influxdb/v2/tags/notebooks/)