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How to change IP address in RHEL6 and Suse10


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Question about IP change in RHEL is far from being dumb.  Not that easy to do in command line...

First you need to go to /etc/sysconfig/network-scripts

and edit the right file (file corresponding to active interface; there is one file per interface), for example

vi ifcfg-eth0

then run command

 /sbin/ifconfig eth0 address

service network restart (or /etc/init.d/network restart)

where is a new address

Then you need to check if your change preserved. If yes, you need to change your /etc/hosts file to reflect the change. 

The other way is via GUI network applet, which takes care about all those edits at once:

1. Go to system/Administration/network

2. Double click on the active interface

3. Change the IP address, network mask and gateway

4. Save changes and click on activate

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Howto Red hat enterprise Linux 5 configure the network card

Q. I've installed Red Hat enterprise Linux 5 and now added one more LAN card (NIC). How do I configure the network card from the command line? I can see 2nd my network card detected while booting the IBM server.

A. Red hat Linux provides following tools to make changes to Network configuration such as add new card, assign IP address, change DNS server etc.

[a] GUI tool (X Windows required) - system-config-network
[b] Command line text based GUI tool (No X Windows required) - system-config-network
[c] Edit configuration files stored in /etc/sysconfig/network-scripts/ directory.

Following instructions are compatible with
(1) Cent OS Linux
(2) Fedora Core Linux
(3) Red Hat Enterprise Linux (RHEL) 3/4/5

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Howto Red hat enterprise Linux 5 configure the network card

A concise guide for RHEL 5 network configuration


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Last modified: March 12, 2019