Shell Script to Split IP Address into Separate Octets

by Nish Vamadevan · Jun 20, 2014 · 1 min read

The following shell script splits an IP into separate Octets into its own variables. This method can be used for any script which needs to take each octet into account, such as generating firewall rules etc…

echo -n " Enter the IP Address (Example: 192.168.160.0): "
read IP
oct1=$(echo ${IP} | tr "." " " | awk '{ print $1 }')
oct2=$(echo ${IP} | tr "." " " | awk '{ print $2 }')
oct3=$(echo ${IP} | tr "." " " | awk '{ print $3 }')
oct4=$(echo ${IP} | tr "." " " | awk '{ print $4 }')
echo "IP Address is $oct1.$oct2.$oct3.$oct4"