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Connecting with SSH

tip

This article is not a required part of the Quickstart, but illustrates the procedure of connecting to the Omega using SSH.

Connecting to your Omega2 over SSH (Secure Shell) lets you interact with the device’s Linux command line from any computer on the same network. No USB-to-serial hardware required.

Before You Start​

SSH creates an encrypted command-line session between two computers: your PC (the client) and the Omega (the server).
Make sure both devices are on the same LAN segment—either through the same Wi-Fi access point, Ethernet switch, or the Omega’s own AP mode.

Pros & Cons​

Pros

  • Works wirelessly—nothing to plug in once the Omega is powered and connected to the same network.
  • Multiple simultaneous sessions are possible.
  • Supports file transfers with SCP/SFTP.

Cons

  • If the network drops, your SSH session ends immediately.
  • Requires the Omega’s IP address or hostname.

Finding the Omega’s IP Address​

Follow the steps in the Find the Omega’s IP Address guide.

Finding the Omega’s Hostname​

Every Omega advertises a unique hostname in the form omega-XXXX.local, where XXXX are the last four characters of its MAC address.
You can find the MAC on the module’s label or by running ifconfig from a serial console.

Procedure​

You will need:

  • An Omega2 that is powered on and connected to the network.
  • The Omega's IP address or hostname
  • The default login credentials:
    • username: root
    • password: onioneer
  • A host computer to use to connect to the Omega

Select the host computer operating system below for the relevant instructions:

Step 1: Open Terminal​

Open the Terminal application found in Applications → Utilities.

Step 2: Connect over SSH​

Run the following command:

ssh root@HOST

Replace HOST with the Omega’s hostname (omega-XXXX.local) or its IP address.

Step 3: Enter Password​

When prompted, enter the password.
By default, the password is: onioneer

If prompted with a message saying The authenticity of host … can’t be established. Are you sure you want to continue connecting (yes/no)?

Type yes and press Enter.

This adds the Omega’s fingerprint to the ~/.ssh/known_hosts file on your computer so future connections are verified.

Step 4: Verify connection​

The Omega terminal will show the welcome banner: