[Oracle DataBase Server 12.1 installation on Oracle Linux 6.7 with ASM and GRID]: Setup hostname and hosts

# vi /etc/hosts

## Localdomain and Localhost

127.0.0.1 localhost.localdomain localhost

## DataBases

192.168.1.11 moscow.localdomain moscow

Setup hostname for server

# vi /etc/sysconfig/network

NETWORKING=yes
HOSTNAME=moscow.localdomain

After this steps i recommend to reboot server