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problem of networking in centos

 
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# 1  
Old 11-11-2010
problem of networking in centos
Hello,
I am using dual boot of linux, one is ubuntu and the other is one is centos.
I have three NIC's and only one of them connected with cable.
The thing is that when I boot from the ubuntu, it does recognize it and I am connected to the Internet.
When I boot from the centos I am not connected to the Internet and when I do ifconfig then it tell me that my IP is 127.0.0.1 (loop back).
From ubuntu I know that it is eth1 that is connected with the cable.


Now how do I configure centos to recognize it and to connect to the network?
# 2  
Old 11-11-2010
what version of Centos?
# 3  
Old 11-11-2010
Quote:
Originally Posted by fpmurphy
what version of Centos?
When I do uname -a , I have :
Linux centos 2.6.18-194.el5

after that it give the current date and i868 ...


It is CentOS-5.5
Last edited by programAngel; 11-11-2010 at 10:48 AM..
# 4  
Old 11-11-2010
If it doesn't show the interfaces, even when you run ifconfig -a, then it's not detecting them at all.
# 5  
Old 11-11-2010
Quote:
Originally Posted by Corona688
If it doesn't show the interfaces, even when you run ifconfig -a, then it's not detecting them at all.
when I do ifconfig -a then it does show all the three eth's - eth0,eth1,eth2.

But none of them has an IP.

eth1 is the one that has the cable.
How do I make it to get an IP?
# 6  
Old 11-11-2010
Quote:
Originally Posted by programAngel
when I do ifconfig -a then it does show all the three eth - eth0,eth1,eth2.

But none of them has an IP.

eth1 is the one that has the cable.
How do I make it to get an IP?
run dhclient, I suppose.

Two minutes of googling also netted centos' official documentation on creating and configuring network devices via the GUI.
This User Gave Thanks to Corona688 For This Post:
programAngel
# 7  
Old 11-11-2010
Quote:
Originally Posted by Corona688
run dhclient, I suppose.

Two minutes of googling also netted centos' official documentation on creating and configuring network devices via the GUI.
Thanks, It solved the problem.

As for the googeling, I have NOT installed GUI, so it is not relevant for me.

By the way for some unknown reason (to me) in the centos he find the cable in the eth2 and not 1.
I mean eth2 now have an IP and I am able to connect the Internet.
I don't get it.
Am I missing something?
 
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