In this tutorial, we'll give you a step by step description on how to change your server's IP address on CentOS 5/6. Remember that you need to be root user or have root privileges to perform this commands.
1. Confirm your current IP address:
ifconfig eth0
You should have an output like this:
eth0 Link encap:Ethernet HWaddr 00:16:3C:2A:76:60 inet addr:10.10.10.39 Bcast:10.10.10.63 Mask:255.255.255.224 inet6 addr: fe80::216:3cff:fe2a:7660/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:3287516 errors:0 dropped:0 overruns:0 frame:0 TX packets:1961807 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1048333886 (999.7 MiB) TX bytes:2596365984 (2.4 GiB)
Pay special attention to the values of inet addr, Bcast and Mask. This reflects your current IP addressing.
2. Change the values with the new IP address
You need to edit the ifcfg-eth0 interface in order to change the IP address and the corresponding networking values.
vi /etc/sysconfig/network-scripts/ifcfg-eth0
Edit the values of IPADDR, GATEWAY, NETMASK
DEVICE=eth0 BOOTPROTO=static ONBOOT=yes IPADDR=10.10.10.39 GATEWAY=10.10.10.33 NETMASK=255.255.255.224
Save the file
3. Restart the network service:
service network restart
4. Confirm the changes:
ifconfig eth0
You should see the inet addr, Bcast and Mask values updated.
Thank you!
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