Fully Qualified Host Name
A fully qualified domain name (FQDN), sometimes also referred to as an absolute domain name.
Edit file /etc/hosts
127.0.0.1 localhost.localdomain localhost your server IP addr yourhost.your.domain yourhost
Example:
127.0.0.1 localhost.localdomain localhost 11.22.33.44 myhostname.example.com myhostname
