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Add a note about docker installed from snap #19309

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Add a note about docker installed from snap #19309

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ad20388
Add a note about docker installed from snap
dsame Jul 26, 2022
5f8caf0
fix typos
dsame Jul 26, 2022
5d2010a
Added some edits
Sep 12, 2022
0f991d0
Merge branch 'main' into patch-1
Sep 12, 2022
ac82698
Apply suggestions from code review
Sep 12, 2022
e18131e
Update content/actions/using-github-hosted-runners/about-github-hoste…
Sep 12, 2022
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4 changes: 4 additions & 0 deletions content/actions/using-github-hosted-runners/about-github-hosted-runners.md
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Expand Up @@ -199,6 +199,10 @@ Actions that run in Docker containers have static directories under the `/github
- `/github/workspace` - {% data reusables.repositories.action-root-user-required %}
- `/github/workflow`

### Checking how Docker was installed

To pass the inputs of an action into the Docker container, the runner uses environment variables that might contain dashes as part of their names. The action may not able to get the inputs if the Docker engine is not a binary executable, but is instead a shell wrapper or a link (for example, a Docker engine installed on Linux using `snap`). If this occurs, the build will subsequently fail with the message `Error: Input required and not supplied: java-version`.

## Further reading
- "[Managing billing for {% data variables.product.prodname_actions %}](/billing/managing-billing-for-github-actions)"
- You can use a matrix strategy to run your jobs on multiple images. For more information, see "[Using a matrix for your jobs](/actions/using-jobs/using-a-matrix-for-your-jobs)."
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