I've just cloned a computer (see here for my process, if it's relevant) and I want to make sure it will be OK on the same network as the original.
I've changed the host name back to what it was pre cloning, so there won't be duplicates on the network, but I want to make sure I make any other necessary fixes before I put the computers running Ubuntu 12.04, on the same network. Is there anything else I need to do before I link them back up?
Best Answer
You must change the host name; you've already done that.
Depending on how your computer obtains its IP address, you may need to update it.
/etc/network/interfaces
, but if you used wicd or NetworkManager then you'll need to update the relevant configuration.You must change the SSH host key. Each computer needs to have its own private key. Remove
/etc/ssh/ssh_host_*_key*
and rundpkg-reconfigure openssh-server
to generate new host keys.