SSH connection is exclusively dedicated for the developer’s access to Volumio OS via command-line. It is disabled as default (recommended for security reasons). Enable it only if required, for remote support or for saving a log link.
To enable SSH:
Navigate to http://volumio.local/dev or http://yourvolumioip/dev, where volumio / yourvolumioip is the actual name / IP address of your device eg. Rivo or 192.168.1.54.
Find the SSH section, and click ENABLE. From now on your SSH will be permanently enabled. To disable SSH again, click DISABLE.