[Founder & CEO, EM @QUE.COM]

Start running.
wget http://www.cisco.com // to download the index.html file of cisco.com website.

run the command to clean up, display sub domains and sort it.
grep -o ‘[A-Za-z0-9_\.-]*\.*cisco.com’ index.html |sort -u

[Founder & CEO, EM @QUE.COM]

Example of checking IPs of the access.log file. This will shows IPs in order.
$ cat access.log | cut -d ” ” -f 1 | sort u

Results.
200.10.10.2
208.20.10.5
70.30.10.89
71.89.10.101
98.77.10.123
99.11.11.18

Show unique IPs and how many times it connect to the target machine.
$ cat access.log | cut -d ” ” -f 1 | uniq -c | sort urn

1080 200.10.10.2
90 208.20.10.5
75 70.30.10.89
50 71.89.10.101
20 98.77.10.123
10 99.11.11.18

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