# Config Backups

**Config Backups** lets you view, download, and compare configuration backups across your fleet. MaaS captures configuration backups nightly and on-demand. Open from **TB Nodes > Config Backups**.

<figure><img src="/files/UOJMoVPzBDRwAc7TD1RS" alt=""><figcaption><p>Config Backups — 90-day backup history</p></figcaption></figure>

***

## Browsing Backups

* **Hosts** — click to select one or more devices (or **All**) to view their backup history.
* **Backup table** — every backup from the last 90 days with date, config name, hash, and size.
* **Show unique configs only** — hide duplicate entries (same config hash). On by default.

***

## Actions

| Action                      | Description                                                                                                            |
| --------------------------- | ---------------------------------------------------------------------------------------------------------------------- |
| **Download**                | Download an individual backup as `.json.gz`.                                                                           |
| **Download Selected**       | Select multiple backups and download them as a single zip.                                                             |
| **Check for Config Change** | Pick a device from the right-side dropdown and trigger an immediate backup check — useful after a known config change. |
| **Compare**                 | Select any two backups (from the same device or different devices) for a side-by-side diff.                            |

***

## Comparing Backups

Select two backups and click **Compare** for a side-by-side diff.

<figure><img src="/files/IAT0Im53XwQpIMRn38jG" alt=""><figcaption><p>Side-by-side diff</p></figcaption></figure>

The diff is color-coded:

* **Green** — added
* **Red** — removed
* **Purple** — moved or reordered

### Diff Controls

| Control              | What it does                                               |
| -------------------- | ---------------------------------------------------------- |
| **Differences only** | Hide unchanged lines.                                      |
| **Hide moved**       | Hide reordered sections, so you can focus on real changes. |
| **Copy**             | Copy the full config from either side to your clipboard.   |
| **Export .diff**     | Download a standard unified diff file.                     |
| **Fullscreen**       | Expand the diff to fill the screen.                        |

***

## Tips

* Use **Compare** with the same device across two dates to audit what actually changed on a specific unit.
* Use it across two devices to check for configuration drift in what should be identical setups.
* **Differences only + Hide moved** is usually the right combination for "what changed that matters".


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://prosbcdocs.telcobridges.com/maas-documentation/maintenance/config-backups.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.