this is a script that can calculate avaliable ip address range netmask/netmask length

based on ip add and netmask length/netmask

Usage network.sh Input : IP-address netmask or IP-address netmask-length

Examples network.sh 192.168.1.1 24 or 192.168.1.2 255.255.255.0

it'll give you the following informations about the network:

• network-id： 192.168.1.0
• netmask-length： 24
• netmask： 255.255.255.0
• wildcard-mask： 0.0.0.255
• ip address range： 192.168.1.1 - 192.168.1.254