Linux eth0 config

[Rockman75]

Hi, im using RedHat 7.2 and am a linux starter.

Im configuring eth0 of NIC and assigned IP address via command prompt.
Then, ifconfig -a shows all interfaces are up and running and valid address are assinged.

However, everytime I shutdown or reboot the system, all ipaddress assigned to eth0 are erased and I need to re-do the same thing again. How do I keep the configuration? Is there save command or way to keep the setting all the time?

Someone let me know... Thank you

 

[stefanwagner]

I'm running a debian-like installation, and perhaps the directories are located differently, so you have to modify it a bit:

I have a file /etc/init.d/if-up with the simple line
ifconfig eth0 192.168.0.3 up and a symbolic link to /etc/rc4.d/S40if-up (because runlevel 4 is multiuser + networking).

Perhaps I should have a file to stop networking - but I allways need networking, so why bothering?

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[NGK]

Hi, Rockman75.

Redhat Linux stores network interface configuration information in files in /etc/sysconfig/network-scripts directory. For example ifcfg-eth0 - file for first ethernet interface.
For static IP the followin is needed:

DEVICE=eth0
IPADDR=xxx.xxx.xxx.xxx
NETMASK=xxx.xxx.xxx.xxx
GATEWAY=xxx.xxx.xxx.xxx
BOOTPROTO=static
ONBOOT=yes