====== IP address assignment ======
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  - Interface configuration using DHCP service example: <code bash>#vim /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=dhcp
HWADDR= 00-19-DB-AD-19-99
ONBOOT=yes</code>
  - Interface configuration using manually set parameters: <code bash>#vim /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
HWADDR= 00-19-DB-AD-19-99
IPADDR=192.168.1.2
NETMASK=255.255.255.0
BROADCAST=192.168.1.255
GATEWAY=192.168.1.1
ONBOOT=yes
DNS1=8.8.8.8
DNS2=8.8.4.4</code>

To check the interface configuration:
<code bash>
  ifconfig eth0
</code>

To check the routes:
<code bash>
  netstat -r
</code>

To restart the interface and to apply the new settings:
<code bash>
  ifdown eth0 - disable
  ifup eth0 - enable
</code>