Ping Sweeping with Bash

#!/bin/Bash
# Author: pr0b3r7

if [] "$1" == "" ]
then
echo "Usage: ./pingsweep.sh [network]"
echo "Example: ./pingsweep.sh 192.168.1"
else
for ip in 'seq 1 254' ; do
ping -c 1 $1.$ip | grep "64 bytes" | cut -d " " -f 4 | sed 's/.$//' &
done
fi 

Optional :

Save pingsweep script output to a text file :

./pingsweep.sh 192.168.1 > iplist.txt

Show contents of iplist.txt and sort by unique value

cat iplist | sort -unique

Creative usage:

For loop to do basic scan of the IPs in the list and save to text file

for ip in $(cat iplist.txt); do nmap -Pn $ip; done > nmapresults.txt