TL;DR: Enable WSL integration for that distro: Docker Desktop > Settings > Resources > WSL Integration > toggle your distro on > Apply & Restart. The docker CLI inside WSL comes from Desktop's integration, not from a Linux install; a distro without the toggle has no docker binary at all.

## The error

```text
The command 'docker' could not be found in this WSL 2 distro. We recommend to activate the WSL integration in Docker Desktop settings.
```

## Fix it

1. Open Docker Desktop Settings > Resources > WSL Integration.
2. Toggle ON the distro where you want docker.
3. Apply & Restart.
4. In the distro, verify:
   `docker ps`
   Expected: works.

## When this applies
- Multiple WSL distros, docker missing in some
- After installing a new distro

## When this does NOT apply
- Native Linux (install docker properly there)
- "Cannot connect to the Docker daemon" inside WSL (integration on but Desktop not running)

## Versions
Docker Desktop 4.x with WSL2 backend.

## Why it happens
Desktop injects the CLI and credentials into each enabled distro via its integration. Distros not toggled get nothing, hence 'command not found' rather than a connection error.

## Edge cases
- Do NOT `apt install docker-ce` inside the WSL distro alongside Desktop integration; the two daemons fight over the socket.
- 'Enable integration with my default WSL distro' covers only the default; extra distros need individual toggles.
- After Windows updates, integration sometimes silently disables; re-toggle fixes it.