Debian slim is a reduced container image of Debian Linux: a starting environment onto which you add your application and its required libraries. It is useful when you want Debian's package ecosystem without every convenience included in a fuller image. The reduced contents make dependency checks important, especially for certificates and native libraries. The word stable is a moving release label, so choose a specific release when reproducible builds matter.
Deployment and operating notes
Debian publishes a release lifecycle, while the official container-image artifacts are built through the debuerreotype project. The stable-slim tag follows the current stable distribution rather than permanently identifying the release used in the old article. The quoted 2018 compressed and unpacked sizes are not a current comparison of complete application images.
For reproducible builds, choose an explicit Debian release and image digest, then maintain a process to rebuild when security updates are available. Slim images omit conveniences, so check CA certificates, timezone data, native shared libraries and diagnostic expectations for the application. Compare the final runtime image rather than the empty base alone. Review support for the packages actually installed, including third-party repositories and language dependencies; distribution support does not automatically cover them. When changing releases, rebuild and test native extensions and application startup rather than carrying binaries across blindly. Keep a known-working application image for rollback, with data migration handled separately from the operating-system image.
Historical upstream link check · 2026-10-09
The recorded upstream address responded successfully (HTTP 200) on 2026-10-09. Link availability does not certify the historical installation instructions or current security support.
Website availability is separate from project, chart and image support. Use the current guidance and primary sources on this page to assess the distribution.
Historical Kubedex content
Original publication: 2018-10-13T15:44:06+00:00. Preserved for context. Commands, versions, prices and results below reflect the original research.
Debian is a Linux distribution that’s composed entirely of free and open-source software.
Debian have done an awesome job of reducing the size of their stable-slim tagged container images down to just 22mb compressed and 55mb on disk. You get access to a CVE database and ecosystem of packages that seems at least as good as Redhat.
The only real thing to consider here if you want to go Debian based is whether to use the Bitnami Minideb image instead. This is built slightly differently to the official Debian stable-slim images and gets updated every 24 hours to pull in the last days patches. Some may argue that this happens anyway when you build most images due to the apt-get upgrade.
Minideb was released before the official team made the image size reductions. Here’s their article from back in January 2017 which seems to not be relevant today in terms of the size differences.
This is definitely a good choice for free base image. Read our comparison blog to see how it compares to the others.
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