Setup Virtual Network Configuration in Ubuntu Server

1 => Open /etc/rc.local  file and make entry like below  given format.


#vim /etc/rc.local


#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
ifconfig eth0:0 192.168.1.101 netmask 255.255.255.0
route add -net 192.168.1.0 netmask 255.255.255.0 gw 192.168.1.1 dev eth0:0
exit 0
~                                  




#save file and exit




Note: Modify IP address according to your need .


2 => Restart the server


3 => check


 #ifconfig
eth0      Link encap:Ethernet  HWaddr 00:50:56:bc:20:ee 
          inet addr:192.168.1.100  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::250:56ff:febc:20ee/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:251416556 errors:0 dropped:12715298 overruns:0 frame:0
          TX packets:133142418 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:205568847089 (205.5 GB)  TX bytes:238098048978 (238.0 GB)

eth0:0    Link encap:Ethernet  HWaddr 00:50:56:bc:20:ee 
          inet addr:192.168.1.101  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1











###############  Enjoy ###########################