awk command

[sanjit]

Hello all,

I would like to write a script that would extract the 5th field using the awk command from the lanscan command. Then I would like to take that field and send it to the ifconfig command and send the output to the screen. Can someone show me how its done please. I kinda know you would have to do something like lanscan > awk '/lan/'.... Thank you for all your assistance.

[James R. Ferguson]

Hi:

for X in `lanscan|awk 'NR>2 {print $5}'`
do
ifconfig $X
done

...JRF...

[boley janowski]

for in `lanscan | awk '{print $5}' | grep -v Net | grep -v Name'
do
ifconfig ${i}
done

[Vincenzo Restuccia]

for I in `lanscan|grep lan|awk '{ print $5 }'
do
ifconfig $I
done

[sanjit]

Hi James, thank you much for your help. One more thing, what does the NR>2 mean?

[James R. Ferguson]

Hi:

The 'NR' variable is the current record count. 'awk' gives you this implicitly. Thus, I am selecting records from the output of the 'lanscan' where the record number is greater then two (2). As you know, this skips 'lanscan's headings.

Regards!

...JRF...

[Vincenzo Restuccia]

The ordinal number of the current record from the start of input. Inside a BEGIN action the value is zero. Inside an END action the value is the number of the last record processed.

[MANOJ SRIVASTAVA]

Hi Sanjit

Try this

lanscan | awk '{print $5}' | grep lan >/tmp/x
for i in 'cat /tmp/x'
do
ifconfig $i
done


Manoj Srivastava

[Eric Bramble]

Here is the same but with only one line

lanscan | awk 'NR>2{system("ifconfig "$5)}'