How to extract the interface number from ifconfig -a

pooppp · 08-01-2008, 02:16 AM

1.Ifconfig -a will display all interfaces like eth2,eth3 etc., right..
I need to extract 2,3 like tht only if the interface HW address starts with 00:0C

2.& I got script for extracting HWaddr starts with 00:0C as below
ifconfig -a | awk '/HWaddr 00:0C/{print $1}'
How to store the interface outputed above in a variable?

Pearlseattle · 08-01-2008, 02:23 AM

Quote:

How to store the interface outputed above in a variable?

You mean something like

MYVAR=$(ifconfig -a | awk '/HWaddr 00:0C/{print $1}')

echo $MYVAR

?

pooppp · 08-01-2008, 03:53 AM

i tried with wht u gave..but not working

jomen · 08-01-2008, 04:22 AM

This was only an example - try to understand what it does.

Quote:

You mean something like

Take a look at the output of ifconfig -a first.

For me it outputs the string "Hardware Adresse"
so for me - this example works:

MYVAR=$(ifconfig -a | awk '/Hardware/{print $1}')
echo $MYVAR

only an example too

pooppp · 08-04-2008, 04:54 AM

Thank u..Working