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Simple Bash Scripting

Step 1: Download the default page of a website

Step2: Find All FQDN and PQDN in index.html
cat index.html | grep "href=" |cut -d'/' -f3|grep|sort-u|cut -d'"' -f1 >domain.txt

Step 3: Find Ip address of all domain names which we got from the last step.To do so we will make a bash script.

for hostname in $(cat domain.txt); do
host $hostname |cut -d' ' -f4|tr -d 'a-z' &

Step 4: Now find whether these Ip address are alive or not.So again we will make a script that will do ping sweep.
./ >Ipaddress.txt


for ipaddress in $(cat Ipaddress.txt);do
echo $ipaddress   $(ping $ipaddress -c 1|grep "received"|cut -d',' -f2) &

Now lets have look to the results:->


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