SSH

Quick Start

In order to SSH into your device, you’ll need a GitHub account with SSH keys. See this GitHub article for getting your account setup with SSH keys.

Enable SSH in your device’s settings
Enter your GitHub username in the device’s settings
Connect to your device
- Username: comma
- Port: 22 or 8022

Here’s an example command for connecting to your device using its tethered connection:
ssh comma@192.168.43.1

For doing development work on device, it’s recommended to use SSH agent forwarding.

Notes

The public keys are only fetched from your GitHub account once. In order to update your device’s authorized keys, you’ll need to re-enter your GitHub username.

The id_rsa key in this directory only works while your device is in the setup state with no software installed. After installation, that default key will be removed.

See the community wiki for more detailed instructions and information.

Connecting to ssh.comma.ai

SSH into your comma device from anywhere with ssh.comma.ai. Requires a comma prime subscription.

Setup

With software version 0.6.1 or newer, enter your GitHub username on your device under Developer Settings. Your GitHub authorized public keys will become your authorized SSH keys for ssh.comma.ai. You can add any additional keys in /system/comma/home/.ssh/authorized_keys.persist.

Recommended .ssh/config

With the below SSH configuration, you can type ssh comma-{dongleid} to connect to your device through ssh.comma.ai.
For example: ssh comma-ffffffffffffffff

Host comma-*
  Port 22
  User comma
  IdentityFile ~/.ssh/my_github_key
  ProxyCommand ssh %h@ssh.comma.ai -W %h:%p
Host ssh.comma.ai
  Hostname ssh.comma.ai
  Port 22
  IdentityFile ~/.ssh/my_github_key

One-off connection

ssh -i ~/.ssh/my_github_key -o ProxyCommand="ssh -i ~/.ssh/my_github_key -W %h:%p -p %p %h@ssh.comma.ai" comma@ffffffffffffffff

(Replace ffffffffffffffff with your dongle_id)

ssh.comma.ai host key fingerprint

Host key fingerprint is SHA256:X22GOmfjGb9J04IA2+egtdaJ7vW9Fbtmpz9/x8/W1X4
+---[RSA 4096]----+
|                 |
|                 |
|        .        |
|         +   o   |
|        S = + +..|
|         + @ = .=|
|        . B @ ++=|
|         o * B XE|
|         .o o OB/|
+----[SHA256]-----+