Set /etc/hosts

On RT System Editor of Eclipse, Name Server View may not become effective.
It is avoidable by commenting out the IPv6 item of /etc/hosts.

% sudo gedit /etc/hosts

Example: /etc/hosts localhost yourservername # (note: your host name)

  1. The following lines are desirable for IPv6 capable hosts
  2. ::1 localhost ip6-localhost ip6-loopback
  3. fe00::0 ip6-localnet
  4. ff00::0 ip6-mcastprefix
  5. ff02::1 ip6-allnodes
  6. ff02::2 ip6-allrouters
  7. ff02::3 ip6-allhosts