Shell Programming and Scripting

Hi guys,

I have a script, which after running for 20 minutes,
produces a bunch of IPs. Due to a DHCP scope, some of these IPs
are not useable, so I would like to eliminate them from the final list.
I have used comm to do this, but am unable to extract the first column,
and redirect it to a file. I've spent 30 minutes trying to do this
Could you guys help me out?
I need column 1 below in the file, and I don't want column 2 in there.
I've tried awk, but it produces nothing but 40+ blank lines if I print $2 3 4, etc.

Real IPs removed.

Thanks

Code:

knock@box01:~/userName$ comm -3 temp1 temp2 | awk '{ print $0}'

1.2.3.1
1.2.3.2
        1.2.3.1
        1.2.3.2
        1.2.3.3

I need 1.2.3.1 and 1.2.3.2 and 1.2.3.3 in a file,
which will be the addresses we know we can safely use.

Output of comm is delimited by tab. Awk uses space as default delimiter

Code:

awk -F"\t" ' { print $2 } '