metric=$1
gateway=$2
cidr=$3

for i in $(cat ips | grep "^[0-9]"); do
        addip="
        iface ens192 inet static \n
                address ${i}/${cidr} \n
                post-up route add default gw ${gateway} metric ${metric} \n
        "
        echo -e $addip >> /etc/network/interfaces
done