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