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@

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


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


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 You can add any additional keys in /system/comma/home/.ssh/authorized_keys.persist.

One-off connection

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

(Replace ffffffffffffffff with your dongle_id) host key fingerprint

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