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Clarify interactive shell app lifecycle #2436

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tripledoublev merged 2 commits into from
Jul 23, 2026
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Clarify interactive shell app lifecycle #2436

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Clarify interactive shell app lifecycle
tripledoublev Jul 23, 2026
f0c1c9e
docs: simplify region heading
tripledoublev Jul 23, 2026
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4 changes: 2 additions & 2 deletions machines/flyctl/fly-machine-run.html.md
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Expand Up @@ -77,7 +77,7 @@ You can give the Machine a custom name with the `--name` flag:
fly machine run . --name my-special-Machine
```

## Choose a geographical region
## Choose a region

Tell the Fly.io platform which [region](/docs/reference/regions/) to create the Machine in with the `--region` flag; if for some reason it can't start a new Machine in that region, you'll get an error. If the `--region` flag is omitted, the platform chooses the region that's fastest to reach from your location.

Expand Down Expand Up @@ -123,7 +123,7 @@ The following command creates a temporary Machine using the Dockerfile in the wo
fly machine run . --shell
```

If you don't specify an app, a temporary app is created for the Machine. When you log out of the shell, the Machine, and if applicable, the temporary app, is deleted.
If you don't specify an app, flyctl creates or reuses an app for interactive shells. When you log out of the shell, the Machine is deleted; the app is retained for future shells.

The default shell is Bash. The `--command` flag allows you to specify a different shell if Bash isn't present in the Machine's Docker image. Log in as a non-`root` user using the `--user` flag.

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