> For the complete documentation index, see [llms.txt](https://docs.uniqpath.com/dmt/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.uniqpath.com/dmt/updating-devices/core-ideas.md).

# Core idea

**DMT ENGINE** once you fetch it from the source does not have any connection to the outside world. It is isolated on your computer. Before it is run it just sits in `~/.dmt` directory in its entirety.

Even when it is run it does not connect to any outside service in its initial configuration. We will set it up to always connect to your PS. We signify this as `PC → PS`. This is for a later section in this manual. 

We have to start somewhere else first.

### DMT ENGINE Replication

The gist of the idea:

```bash
# just an illustration - do not use in practice, read below
rsync ~/.dmt user@ip
```

{% hint style="info" %}
 This is the basics for **DMT ENGINE** replication.
{% endhint %}

If you did that, it would work but there are still some details and edge cases that need to be handled and so it is much better to use:

```bash
dmt update user@ip
```