> For the complete documentation index, see [llms.txt](https://docs.cryptosat.io/cryptosat/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cryptosat.io/cryptosat/flastsat-environment/access-and-control.md).

# Access and Control

## Access

### Connect to Environment

The Flatsat can be accessed using SSH. Please email <contact@cryptosat.io> for more details.<br>

## Control

### The Local Machine

The local machine is a Debian based machine connected to the internet and to the Flatsat. This machine facilitates access to all the Crypto Engines.

#### Individual Crypto Engine Control

From the local machine terminal, you can use SSH to directly connect to a Crypto Engine. The following command will connect to the Crypto Engine 2 via SSH.

```bash
ssh ce2
```

`sftp` can be used to transfer files. Other common utilities are installed on the local computer as well.

Here is an example how to upload a file using `sftp:`

```
sftp -i .ssh/id_rsa -P [port] user@server_ip
```

#### Crypto Engine  Orchestration

**Ansible** is installed on the local machine. The `~/ansible/` directory contains the inventory and configuration files to quickly run playbooks and commands across all the Crypto Engines.&#x20;

For example, this command will run `hostname` **on all Crypto Engines**:

```bash
~/ansible $ ansible crypto_engines -a "hostname"
```

This command will run `hostname` **just on Crypto Engine 0 (ce0)**

```bash
~/ansible $ ansible ce0 -a "hostname"
```

The playbook  `copy.yml` can be used to upload files to **all** Crypto Engines

```
~/ansible $ ansible-playbook copy.yml -e "src=~/test3"
```

The target `targets` parameter can be used to specify a subset of hosts. The `dest` can be used to specify a remote path and name.

```
~/ansible $ ansible-playbook copy.yml -e "targets=ce2,ce3 src=~/test3"
```

Please refer to the Ansible [documentation](https://docs.ansible.com/ansible/latest/index.html) for more information. The Cryptosat team will be happy to assist you in creating Ansible playbooks.