I suspect I have screwed up the config file for ssh on raspian. I was able to ssh into my pi fine, now ssh client refuses to connect. I am partially disabled and don't have a screen or keybd - I was using ssh for everything before. The box is pingable at its usual IPv4 address (over ethernet).
Is there any way to get into the pi remotely over the network to fix the problem ? I am assuming however that it could be fixed if I can find a friend who has a suitable keyboard and display though.