Script to generate /etc/network/interfaces file on Ubuntu/Debian

            echo -n “Insert IPstart:”
            read ipstart
            echo -n “Insert IPend:”
            read ipend
            echo -n “Insert Gateway:”
            read gw
            #echo -n “Insert Subnet: ”
            #read subnet
            echo -n “Insert Netmask: ”
            read net
            echo -n “Insert aliast to start: ”
            read ali

            firstIp=`echo “${ipstart%.*}”`
            lastIpStart=`echo “${ipstart##*.}”`
            lastIpEnd=`echo “${ipend##*.}”`
            dif=`echo $(($lastIpEnd-$lastIpStart))`

            for ((i=$ali;i<=$ali+$dif;i++)){ echo "auto eth0:$i" >>$ifile
            echo “iface eth0:$i inet static” >>$ifile
            echo “address $firstIp.$ip” >>$ifile
            echo “network $subnet” >>$ifile
            echo “netmask $net” >>$ifile
            echo “gateway $gw” >> $ifile
            echo ” ” >> $ifile
            let ip++

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