CMD vs ENTRYPOINT in Docker 🐳 | Key Differences Explained | DevOps Tutorial
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This video by Shubham Gour provides a practical tutorial on the differences between the CMD and ENTRYPOINT instructions in a Dockerfile. Key takeaways include:
CMD (Command): Acts as a default parameter for a container. It is easily overridden by passing arguments at runtime (3:36-4:35).
ENTRYPOINT: Defines a fixed application or command for the container. Unlike CMD, additional arguments passed at runtime are appended to the ENTRYPOINT rather than replacing it (7:28-8:20).
Using Both Together: When used in the same Dockerfile, ENTRYPOINT acts as the primary executable, while CMD provides the default arguments. In this configuration, the CMD values can still be overridden at runtime, while the ENTRYPOINT remains fixed (9:06-10:44).
The video uses a series of hands-on demonstrations with Ubuntu-based images to illustrate how these instructions behave independently and in combination.
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