Can't change ip address in Centos 6

rcmonroig · 01-23-2014, 01:23 AM

Trying to change my ip address from 10.0.2.23 to 192.168.105.22 on my centos 6 system.

I run
ip link set eth0 down
ip addr add 192.168.105.22 dev eth0
ip link set eth0 up
service network restart

Then I run ifconfig and the ip address
is 10.0.2.23 same as before -- no change
This should be pretty straight forward. Am I missing something here?

druuna · 01-23-2014, 03:23 AM

Quote:

Originally Posted by rcmonroig

Trying to change my ip address from 10.0.2.23 to 192.168.105.22 on my centos 6 system.

I run
ip link set eth0 down
ip addr add 192.168.105.22 dev eth0
ip link set eth0 up
service network restart

Then I run ifconfig and the ip address
is 10.0.2.23 same as before -- no change
This should be pretty straight forward. Am I missing something here?

After running the blue part the ip is changed, but the green part takes its input from ifcfg-eth0 to restart the network. ifcfg-eth0 still contains the original settings.

If you want to permanently change you ip you need to edit /etc/sysconfig/network-scripts/ifcfg-eth0:

Code:

service network stop
edit ifcfg-eth0
service network start

Gunjo · 01-23-2014, 04:46 AM

Quote:

Originally Posted by druuna

After running the blue part the ip is changed, but the green part takes its input from ifcfg-eth0 to restart the network. ifcfg-eth0 still contains the original settings.

If you want to permanently change you ip you need to edit /etc/sysconfig/network-scripts/ifcfg-eth0:

Code:

service network stop
edit ifcfg-eth0
service network start

Thanks for sharing.

jpollard · 01-23-2014, 11:59 AM

The first three commands likely did change the IP number...

but the "service network restart" wiped it out and loaded whatever was in the /etc/sysconfig/network-scripts/ifcfg-eth0"

myatthu · 01-24-2014, 08:31 PM

You might want to make sure ifcfg-ethX
NM_CONTROLLED=no

myatthu · 01-24-2014, 08:33 PM

Another thing is you want to change your setting permanently, for this distribution you need to change at ifcfg-ethx