exec: "python": executable file not found in $PATH

What This Error Means

Docker started the container, but the configured command or entrypoint was not found in the image PATH or at the specified path.

Inspect the Dockerfile ENTRYPOINT/CMD and confirm the file exists in the final image.

Enter the image and check:docker run --rm -it <image> sh then ls -la <path>

Fix permissions in the image build (example:RUN chmod +x /path/to/file).

The binary/script is not present in the image at the expected path.

File permissions do not allow execution (chmod +x missing).

The command is correct but depends on a missing runtime/interpreter.

Rebuild the image and re-run the container.

Confirm the container process starts and stays running.

exec: "python": executable file not found in $PATH

Add a simple smoke test in CI that runs the image and checks the entrypoint.

Prefer absolute paths and ensure scripts have correct line endings and shebang.