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Can't contact machine by its hostname

Hi,

I just upgraded to Ubuntu 11.0.4 (from 10). In my /etc/hostname file, I defined my machine's name, "my-machine". From the server, I'm able to SSH to myself,

ssh dave@my-machine

However, from another machine in the same network, I'm not able to SSH

Code:

davea-mbp2:systems davea$ ssh dave@my-machine

ssh: Could not resolve hostname my-machine: nodename nor servname provided, or not known

However, I'm able to SSH in using the machine's IP address. Any ideas how I get my machine name recognized on the network?

Thanks, - Dave

Add it to the config on your router or DNS server? Or Add my-machine to your /etc/hosts file on each server.