Buildah is a command-line tool for building container images from scratch or using existing images as starting points. The tool supports creating images in both OCI image format and traditional Docker image format. Key capabilities include: - Creating working containers from scratch or existing images - Mounting and unmounting container root filesystems for modification - Building new images from updated container contents - Managing container lifecycle operations including deletion and renaming - Supporting both OCI and Docker image formats The tool operates on most Linux platforms and integrates with container ecosystems. Buildah works as a complementary tool to Podman for container management workflows. Users can manipulate container filesystems directly and create custom images without requiring a running daemon. The project provides comprehensive documentation including installation guides, tutorials, troubleshooting resources, and development guidelines through its official website and GitHub repository.