obtaining the MAC of the interfaces

danndp · 06-03-2011, 04:33 AM

Hi,

I'm running this command, and seems not to work, following the command:

Quote:

for nic in `ls /sys/class/net | grep -v lo`; do echo ${nic}; udevinfo -a -p /class/net/{nic} | grep -i address; done

The output is the following:

Quote:

eth0
eth1

But the output should show something like this: (showing the MAC address)

Quote:

eth0
SYSFS{address}=="00:26:55:df:5d:ba"
eth1
SYSFS{address}=="00:26:55:df:5d:b9"

Am i missing something with the command?

Regards!

ButterflyMelissa · 06-03-2011, 04:39 AM

Yo!

Quote:

Am i missing something with the command?

yes...you're using the wrong command IMHO...

Use

Quote:

arp -a

to see the MAC of the nic's in the box...

Wellness

Thor

blue_print · 06-03-2011, 04:44 AM

Looks like, the for loop is not correct. Please use the following one, it will work.

Code:

for nic in `ls /sys/class/net | grep -v lo`; do echo ${nic}; udevinfo -a -p /sys/class/net/${nic}/address | grep -i address | grep -v looking | grep -v KERNEL; done

danndp · 06-03-2011, 04:46 AM

Quote:

yes...you're using the wrong command IMHO...

Well, i found the mistake =) the command should be like this:

Quote:

for nic in `ls /sys/class/net | grep -v lo`; do echo ${nic}; udevinfo -a -p /class/net/${nic} | grep -i address; done

As you can see, i missed a $ =)

Many thanks for your help

Regards!

danndp · 06-03-2011, 04:47 AM

Quote:

Originally Posted by blue_print

Looks like, the for loop is not correct. Please use the following one, it will work.

Code:

for nic in `ls /sys/class/net | grep -v lo`; do echo ${nic}; udevinfo -a -p /sys/class/net/${nic}/address | grep -i address | grep -v looking | grep -v KERNEL; done

THANKS blue print =)

ButterflyMelissa · 06-03-2011, 04:48 AM

Thanks!

I learned something here

THor

jschiwal · 06-03-2011, 04:54 AM

You could get the MAC address from the contents of the /sys/class/net/*/address file.