Hi, I can connect to my N900 by using command below. ssh root@192.168.2.15: But the precondition is that I open and start Mad Developer on N900 already. And if I close Mad Developer now, I still can connect to N900 by ssh. But if I restart my N900 and don't open Mad Developer any more, then I try to connect to N900 by ssh, I get the response like below. ssh: connect to host 192.168.2.15: port 22: Bad file number Does anyone know why and how to solve it? Thanks!