Docker how to check if docker image contains which version of library

 Inspect the Docker Image Layers: You can use the docker history command to view the layers of a Docker image. Each layer represents a step in the image's construction, and you can inspect the commands executed in each layer. By examining the commands, you might find information about the library versions installed.

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docker history <image_name>

However, this method may not provide detailed information about the specific library versions unless they were explicitly mentioned in the Dockerfile.

Run a Container from the Image and Check the Version: You can run a container from the Docker image and execute commands to check the version of a specific library.

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docker run -it <image_name> <command_to_check_version>

Replace <image_name> with the name or ID of the Docker image and <command_to_check_version> with the command specific to the library you want to check. For example, for Python libraries, you can use pip show <library_name> to get the version.

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docker run -it <image_name> pip show <library_name>

This method allows you to execute commands inside the container and inspect the installed libraries directly.

Check the Dockerfile: If you have access to the Dockerfile used to build the image, you can inspect it to find the specific versions of the installed libraries. Look for RUN commands that install or update the libraries, and check if the versions are explicitly specified.

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RUN pip install <library_name>==<version>

The Dockerfile is the most reliable source to determine the specific library versions used during image creation.

By using these methods, you can obtain information about specific library versions installed in a Docker image. The approach you choose depends on the availability of resources and your specific requirements.