Hosts Files

The host files must contain a fully qualified name for the server.

Update /etc/hosts with information for valid for the server.

<IP-address> <fully-qualified-machine-name> <machine-name>

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4  
130.61.34.139 o19-76.localdomain o19-76

Set the correct hostname in the /etc/hostname file.

o19-76.localdomain