> ## Documentation Index
> Fetch the complete documentation index at: https://docs.nerdit.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Manage applications

> Inspect a machine and operate the services available to your account.

Open **Machines**, then select a machine. Its page shows the Engine version, uptime, last-seen information, and service status. Apps, models, and databases can appear in the list.

The Engine decides which services this remote connection may manage. Expand **Managed locally** to see services that require local administration. Use the [Engine operations guide](/engine/operations) for those services.

## Operate a service

For a manageable service, open its **…** menu:

| Action    | Behavior                                                                                                          |
| --------- | ----------------------------------------------------------------------------------------------------------------- |
| Restart   | Restart the service on the machine.                                                                               |
| Redeploy  | Build an app again from its recorded Git source. Unavailable for models, databases, or apps without a Git source. |
| Roll back | Return to the previous image when the Engine reports one is available.                                            |
| Stop      | Stop the service after confirmation. Start it again using the Engine's local controls.                            |

After a redeploy, wait for the service status and last-deploy information to update. **Redeploy started** means the machine accepted the build, not that the application is ready.

<Warning>
  Stopping an app interrupts its availability. Rolling back an image does not reverse a database migration or restore application data. Use the [Engine recovery instructions](/engine/backup-recovery) before changing persistent data.
</Warning>

## Inspect secret names

Choose **… → Secrets** to list the secret keys set for that app. Values are never displayed here. Add or change secrets on the machine using the Engine's controls; this App panel is read-only.

## Publish or make an app private

When public hosted access is available for your account, choose **… → Publish** and confirm **Make public**. Anyone with the hosted link can then open the application without a Nerdit account. Only publish an app whose own content and authentication are suitable for that audience.

Choose **Make private** to remove anonymous access. Public hosted apps require Pro. Publishing applies to applications, not model or database services.

The machine page also offers **Pause public access** to stop anonymous access to all its hosted apps. Use **Resume** to restore their previous exposure settings. This switch does not stop the services or change [domains served directly by the machine](/app/domains).

## Rename or unlink a machine

Use the machine's menu on **Machines** to rename its display name. Renaming does not change its generated address.

Unlinking removes this account's remote access. Applications keep running on the machine, and reconnecting requires a new link. Unlinking is not Engine removal or application deletion.

For local deployment, follow the [Engine deployment guide](/engine/deploy). For logs and diagnostics, use [Engine troubleshooting](/engine/troubleshooting). If the App cannot read services, start with [App troubleshooting](/app/troubleshooting).