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docker run failed with exit code 126 because the command could not be invoked

docker: Error response from daemon: Container command '/etc' could not be invoked.

Exit code 126 means Docker found the specified container command, but it could not be invoked as an executable inside the container.

Exit code 126runtime

Observed message

docker: Error response from daemon: Container command '/etc' could not be invoked.

Why it happens

  • The specified command exists but is not executable.
  • The command points to a directory or other non-invokable target.
  • The container entrypoint or command was overridden incorrectly.

How to fix it

  1. Confirm that the command path refers to an executable file.
  2. Check executable permissions inside the image.
  3. Review entrypoint and command overrides to ensure they reference a runnable binary or script.

Official reference

Docker Docs: Running containers - Exit status 126

Related errors

Exit code 127docker run failed with exit code 127 because the command was not foundfailed to solveDocker build failed to solveLoading the build result for multi-platform images is not supportedDocker Buildx could not load a multi-platform build result locallyCannot connect to the Docker daemonDocker client cannot connect to the Docker daemon

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Docker exit code 126: causes and fixes | Error Atlas