Red Hat

Hi All,

Could any one please help me how to assign IP to a linux box permanently.

IP should not be changed even after Rebooting the machine.

Depends on the flavour of Linux you are using:
RedHat/CentOS: modify the file /etc/sysconfig/network-scripts/ifcfg-eth0
Debian: modify the file /etc/network/interfaces

That worked up to RedHat 6.0. The next version of RedHat that I used is 6.4. On 6.4 it is now /etc/sysconfig/network-scripts/ifcfg-em1. I do not know which release between 6.0 and 6.4 started this.

After you make the change to your network file you can do:

Code:

service network restart

to set the new IP address without an immediate reboot. Or just reboot if you want.

RHEL 6.3 which we have is still using ifcfg-ent0


Robin

FWIW, In RHEL 6.5 here, it is still ifconfig /etc/sysconfig/network-scripts/ifcfg-eth[0-9] , so maybe some installs have different names of the network devices ( ifconfig | awk '{print $1}' RS= ) depending on the types of NIC's installed..

According to the documentation, Appendix A "Consistend Network Device Naming" eth[0123...] are replaced by em[0123...] with RedHat Linux Enterprise 6.x.
Maybe the updates are responsible for the different naming schemes: "Upgrades from Red Hat Enterprise Linux 6.0 to Red Hat Enterprise Linux 6.1 are unaffected, and the old eth[0123…] naming convention will continue to be used."

It also says this:

https://access.redhat.com/site/docum...ce_Naming.html