@zavorra: Well, I can steer your towards my own
package for that (among other things ;D).
As usual, it's simply a KoboRoot.tgz to drop in the .kobo folder.
Once it finishes rebooting, it's as simple as
ssh root@<kobo IP>. In case you have no easy means of figuring out the IP of wireless devices on your network, the Kobo itself will display it in the Settings > Device Information page

.