rails server cannot start; getaddrinfo: nodename nor servname provided, or not known (SocketError)

Question

I have not found a solution to the problem, however someone did already ask about the same problem a few days ago - (Rails Server Keeps Exiting (SocketError))

After

Answer 1

The problem solved by adding 127.0.0.1 localhost record to the private/etc/hosts file, which was removed by some reason before.