I downloaded the PI3 image, and all was well. I followed the instructions to change my password and host name, and all was well. Then I followed the instructions to connect to my home network and I could no longer SSH into that raspberry pi. I followed these steps:
passwd (then followed prompts to change password)
sudo pifi set-hostname NEWHOSTNAME
—> OK so far, now they have me log it into my home network
ubuntu@NEWHOSTNAME:~$ pifi list seen
ubuntu@NEWHOSTNAME:~$ sudo pifi add MyNetwork password
I know this works to connect because I used a monitor and can see that I am logged onto my home network. I can even ssh from this machine to another pi (just running raspbian) in my home. But if I try to ssh in or even ping, I get errors. if I use the host name (ssh ubuntu@ROS_PI.local) I get host not resolved. if I use the ssh ubuntu@IP_Address, I get connection refused. If I ping the IP, I get icmp open socket: operation not permitted. (ubuntu is the pre-loaded user name)
Is there some typical setting in linux that changes with host name or wifi config that would suddenly not allow ssh?