Chainguard Container for bash

Container image with only Bash and libc. Suitable for running any small scripts or binaries that need Bash instead of the BusyBox shell.

Chainguard Containers are regularly-updated, secure-by-default container images.

Download this Container Image

For those with access, this container image is available on cgr.dev:

docker pull cgr.dev/ORGANIZATION/bash:latest

Be sure to replace the ORGANIZATION placeholder with the name used for your organization's private repository within the Chainguard Registry.

Compatibility Notes

The Chainguard Bash image is meant to serve as a drop-in replacement for the official Bash image from Docker Hub. One notable difference between the Docker Hub image and Chainguard's Bash image is the location where bash is installed in the container. The Bash Image from Docker Hub has bash installed at /usr/local/bin/bash while Chainguard's has it installed at the standard /bin/bash.

Like most of Chainguard's images, the Bash image does not operate as the root user and includes only the minimum packages needed to function.

Getting Started

To open up an interactive shell in the Bash Image you could run a command like the following:

docker run -it cgr.dev/chainguard/bash:latest /bin/bash

To test scripts from your local machine on the Bash image, you can use a bind mount. The following example references a local script named local-script.sh, binds it to the container while renaming it container-script.sh, and then runs the script:

docker run -v /path/to/local-script.sh:/container-script.sh cgr.dev/chainguard/bash:latest /container-script.sh

You can also test scripts on the Bash image using a Dockerfile. The following example Dockerfile references a Bash script named test-script.sh:

FROM cgr.dev/chainguard/bash:latest

COPY test-script.sh /

CMD ["bash", "/test-script.sh"]

You could then build an image based off this Dockerfile:

docker build -t my-bash-app .

And then run the new image to test the script:

docker run -it --rm --name my-running-app my-bash-app

Documentation and Resources

• Vulnerability Comparison: bash
• (Tutorial) An Introduction to Shell Scripting

What are Chainguard Containers?

Chainguard Containers are minimal container images that are secure by default.

In many cases, the Chainguard Containers tagged as :latest contain only an open-source application and its runtime dependencies. These minimal container images typically do not contain a shell or package manager. Chainguard Containers are built with Wolfi, our Linux undistro designed to produce container images that meet the requirements of a more secure software supply chain.

The main features of Chainguard Containers include:

• Minimal design, without unnecessary software bloat
• Daily builds to ensure container images are up-to-date with available security patches
• High quality build-time SBOMs attesting to the provenance of all artifacts within the image
• Verifiable signatures provided by Sigstore
• Reproducible builds with Cosign and apko (read more about reproducibility)

For cases where you need container images with shells and package managers to build or debug, most Chainguard Containers come paired with a -dev variant.

Although the -dev container image variants have similar security features as their more minimal versions, they feature additional software that is typically not necessary in production environments. We recommend using multi-stage builds to leverage the -dev variants, copying application artifacts into a final minimal container that offers a reduced attack surface that won’t allow package installations or logins.

Learn More

To better understand how to work with Chainguard Containers, please visit Chainguard Academy and Chainguard Courses.

In addition to Containers, Chainguard offers VMs and Libraries. Contact Chainguard to access additional products.

Trademarks

This software listing is packaged by Chainguard. The trademarks set forth in this offering are owned by their respective companies, and use of them does not imply any affiliation, sponsorship, or endorsement by such companies.