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blog/2021/10/11/replacing-docker-with-podman-on-macos-and-linux/index.html
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<p>There are a number of reasons why you might want to replace docker, especially on macOS. One of the more recent controversies with docker has been related to this feature:</p>
<blockquote class=twitter-tweet><p lang=en dir=ltr>...ignoring Docker updates is a paid feature now?? <a href=https://t.co/ZxKW3b9LQM>pic.twitter.com/ZxKW3b9LQM</a></p>&mdash; Brendan Dolan-Gavitt (@moyix) <a href="https://twitter.com/moyix/status/1388586550682861568?ref_src=twsrc%5Etfw">May 1, 2021</a></blockquote>
<script async src=https://platform.twitter.com/widgets.js></script>
<p>Docker has been one of the larger influencers in the container world, helping to standardize the (<a href=https://github.com/opencontainers/image-spec/blob/main/spec.md>OCI Image Format Specification</a>). For many developers, containers have become synonymous with terms like docker, and the <code>Dockerfile</code> being a file that contains the instructions on how to build an image. Docker has certainly made it very convenient to build and run containers, but it is not the only solution for doing so.</p>
<p>Docker has been one of the larger influencers in the container world, helping to standardize the <a href=https://github.com/opencontainers/image-spec/blob/main/spec.md>OCI Image Format Specification</a>. For many developers, containers have become synonymous with terms like docker, and the <code>Dockerfile</code> being a file that contains the instructions on how to build an image. Docker has certainly made it very convenient to build and run containers, but it is not the only solution for doing so.</p>
<h3 id=what-are-containers>What are containers?</h3>
<p>A container is a standard unit of software that packages up all application dependencies within it. Multiple containers can be run on a host machine all sharing the same kernel as the host. In Linux, namespaces help provide an isolated view of the system: including networking, PIDs, UIDs, and mounts. There is an <a href="https://www.youtube.com/watch?v=sK5i-N34im8">in-depth video</a> that discusses what containers are made from, and <a href="https://youtu.be/sK5i-N34im8?t=2468">near the end</a> there is a demonstration on how to build your own containers from the command line.</p>
<p>By easily allowing the necessary dependencies to live alongside the application code, containers make the &ldquo;works on my machine&rdquo; problem less of a problem.</p>

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