I have searched for old topics but I can't find anything that could solve my issue.
I have installed Ubuntu MATE on SD card and created the
ssh file on the
boot\ directory. I connect the RPi2 directly to the modem via the LAN cable. However, when I use Putty to SSH to my RPi2, it says
Network error: Connection refused, but I can ping the RPi2.
Please note that I don't have a monitor to connect with my RPi2 so I can't access
raspi-config and do anything as long as I can't SSH.
How to solve this problem? Or maybe I installed it wrongly, any working guide would be really appreciated.