I have a kobo libra. What would be the easiest way to get terminal app (with ssh client as a minimum) running on that? I'm thinking it would be a nice really thin client with low energy consumption.
You should be able to use telnet to connect to the CLI of the device by turning on developer mode. By typing devmode in the search bar.
From there you should be able to install a dropbear ssh client to instead be able to connect using ssh.
There should be more information online.