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How To Change IPAddress of Linux/Ubuntu ?


Recently I needed to change the existing ipaddress of a linux machine. Since we migrated to our machines in to new cloud servers.

Just follow the steps defined below:

  • On terminal window type the following command.
           sudo vi /etc/network/interfaces
                or 
           sudo gedit /etc/network/interfaces

  • Then find the eth0 section and set the ipaddress as below
                 auto eth0 
                 iface eth0 inet static
                 address 192.168.10.43
                 netmask 255.255.255.0
                 network 192.168.10.46
                 broadcast 255.255.255.0
             Note: Its my own ipaddresses, you have to define your own addresses.
  • In above file may have " iface eth0 inet dhcp". when you want to define static ip you have to change it to "static". "dhcp" is for dynamic ipaddress.
  • Then save and close the file, then run the restart the network with this command.
                     sudo /etc/init.d/networking restart
  • To ensure ipaddress has been changed just run the command.
                      ifconfig eth0
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