Run Docker commands within a container environment, including starting the Docker daemon and managing containers. Use when building, running, or managing Docker containers and images.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Docker Usage Guide
## Starting Docker in Container Environments
Please check if docker is already installed. If so, to start Docker in a container environment:
```bash
# Start Docker daemon in the background
sudo dockerd > /tmp/docker.log 2>&1 &
# Wait for Docker to initialize
sleep 5
```
On Windows, start Docker Desktop or the Docker service instead of running `sudo dockerd`; then run Docker commands from PowerShell without `sudo`.
## Verifying Docker Installation
To verify Docker is working correctly, run the hello-world container:
```bash
sudo docker run hello-world
```
PowerShell equivalent after Docker Desktop is running: `docker run hello-world`.
The line at the top of this page pins the label git:20260701.599cc4d, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (922 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag
Source
GitHub
openhands/extensions · 179 stars · license MIT · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_7dcc5h6gfl3em3m3
GET https://markdownregistry.com/api/v1/resolve?ref=openhands/extensions/docker
GET https://markdownregistry.com/api/v1/blob/d4c69e41982982cf1b71e265fbcaec478030bee0bf627285a48bea3a84373a3a
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This skill should be used when users ask…
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