Linux Static IP Configuration

Title: How to set a static IP address for a Linux system

1. Centos OS 6.5
   Vi/etc/sysconfig/network-scripts/ifcfg-<interface_alias_name>
   Default modification:/etc/sysconfig/network-scripts/ifcfg-eth0
   
   File:/etc/sysconfig/network-scripts/ifcfg-eth0
   

    for eth0device=Eth0bootproto= none# This line ensures that the interface would be isbrought up during boot. Onboot= for most outbound connections.# the address, netmask, and gateway is all necessary. IPAddr=192.168. 100.5 NETMASK=255.255. 255.0 GATEWAY=198.168. 100.1

   eth0 Code

   File:/etc/sysconfig/network-scripts/ifcfg-eth0:0

    for eth0:0DEVICE=eth0:0Bootproto= none# This line ensures that the Interface'll is brought up during boot. Onboot=yes# eth0:0ipaddr=192.0. 2.6 NETMASK=255.255. 255.0

   eth0:0 Code

   File:/etc/sysconfig/network-scripts/ifcfg-eth0:1

    # Configuration for  eth0:1  device  =eth0:1  bootproto  =none# this line ensures that the interface would be is brought up during boot. Onboot  =yes# eth0:  1  # This is a private IP address. Private IPs  do   not having a gateway (they is Not publicly routable). # All need to specify are the address and netmaskipaddr  =192 .168 . 133.234  netmask  =255.255 . 128.0  

   eth0:1 Code

   Service Network restart

2. Centos 7
   Centos 7 no longer uses the "Network" service, you must create a/etc/sysconfig/network-scripts/ifcfg-eth0 file
   File:/etc/sysconfig/network-scripts/ifcfg-eth0

   Device="eth0"HWADDR="00:21:70:10:7E:CD"nm_controlled="No"Onboot="Yes"Bootproto=static# Bootproto=dhcpipaddr=192.168.1.106NETMASK=255.255.255.0# # The GATEWAY is sometimesinch:/etc/sysconfig/Networkgateway=192.168.1.1

   sample ' static assignment ' configuration Code

Linux Static IP Configuration