Simplified:
I been wondering on how to connect my Macbook and Raspberry Pi together over ethernet ( I do not have access to a crossover atm). I've set up, on the Pi side, by typing
sudo ip add *insert Pi ip here*/24 dev eth0
but when I attempt to use this exact line (changed ip), Macbook doen't connect. At all. Anyone know how to fix this?
Recent versions of Raspbian (which use dhcpcd) allow ssh to work over a link-local address and avahai (which is a zeroconf implementation) enables programs to discover hosts running on a local network.
This means you can plug the Pi into a Computer (with an Ethernet cable) or a local network router and connect without knowing the IP address.
You can easily connect from OS X with ssh pi@hostname.local (the default hostname is raspberrypi)
You can use a crossover cable, but you don't need one (most modern interfaces automatically detect).
I think this answers the question I think you are asking. See How do I set up networking/WiFi/static IP address? if you want more detail.
