Command grep -

[poma]

On 12.04.2013 21:24, Bob Goodwin - Zuni, Virginia, USA wrote:

> It's not clear to me what that should do but it produces a long list,
> not in the form I need? I just want to filter [view] DST=17.*.
> 
> less syslog.txt | grep "DST=17\." does that and solves my immediate need.

A long list - a two IP addresses!? :)
Well, if you don't need this *short* IP addresses output .i.e. for a
'whois'[1] so you can parse the required IP range i.e. for a net filter,
nonetheless can serve as a textbook example of how to use awk and other
tools mentioned - for a general public. ;)
Have a nice weekend!

poma


[1]
whois 17.171.4.13 | grep "CIDR\|NetRange"
NetRange:       17.0.0.0 - 17.255.255.255
CIDR:           17.0.0.0/8

whois 174.35.3.56 | grep "CIDR\|NetRange"
NetRange:       174.35.0.0 - 174.35.127.255
CIDR:           174.35.0.0/17