SSH Access to SB Radio/Touch/Controller and UE Smart Radio
SSH access is only available on devices running the SqueezeOS platform. This is not the case for Squeezebox Classic/Boom/Transporter/Receiver.
Using SSH on *nix/macOS
If you are using the original firmware on the SB Radio/Touch/Controller devices you will find that you will need some additional ssh parameters to connect to the device as the algorithms used by these elderly devices haven't aged well and are deprecated. These extra parameters are not needed if you are using the community firmware.
ssh -c aes128-cbc -oHostKeyAlgorithms=+ssh-rsa,ssh-dss -oKexAlgorithms=+diffie-hellman-group1-sha1 root@[IP address or hostname of your device]
Squeezebox Radio / Touch / Controller
On the Squeezeboxen SSH can be enabled in Settings/Advanced Settings/Remote Access. Follow the instructions on screen.
UE Smart Radio
On the UE Smart Radio enabling SSH is a little more complicated. Many of those useful developers features have been hidden in a Developers menu:
Go to the "Settings" menu
Press both the "Home" and the ">>" (forward) button simultaneously.
Now there should be an additional "Developer" menu at the bottom of the "Settings" menu.
In the Developer menu, go to "Remote Access".
Follow the instructions on screen.