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Learn how Podman’s rootless mode lets ordinary users run containers without a privileged daemon, using user namespaces, subordinate IDs, and slirp4netns for secure, daemon‑less workloads.
Learn how to use Docker multi-stage builds to separate build-time dependencies from runtime artifacts, reducing image size and improving security.
Stop shipping compilers and SDKs to production. Learn how Docker Multi-Stage builds decouple your build environment from your runtime to shrink image sizes and harden security.
Stop shipping your compilers to production. Learn how to use Docker multi-stage builds to reduce image size, shrink your attack surface, and optimize build caches.
Learn how Podman uses User Namespaces and subordinate UIDs to run containers without root privileges, reducing the host attack surface while maintaining container functionality.
An architecture note on Docker multi-stage builds: why two stages are enough, where the trust boundary sits at COPY --from, and the operational checks that prove your runtime image ships no toolchain.
Learn when to use Podman rootless versus rootful execution, see a comparison table, and validate your setup with a single command.
podman
docker