linux擷取網路資訊__linux

 在linux的網路編程中，經常需要用到網路資訊如：ip、gateway、dns等。以下指令碼實現了擷取網路資訊的功能，包括ip、broadcast、netmask、gateway以及dns的資訊

default_route=$(ip route show)default_interface=$(echo $default_route | sed -e 's/^.*dev \([^ ]*\).*$/\1/' | head -n 1)address=$(ip addr show label $default_interface scope global | awk '$1 == "inet" { print $2,$4}')#ip addressip=$(echo $address | awk '{print $1 }')ip=${ip%%/*}#broadcastbroadcast=$(echo $address | awk '{print $2 }')#mask addressmask=$(route -n |grep 'U[ \t]' | head -n 1 | awk '{print $3}')#gateway addressgateway=$(route -n | grep 'UG[ \t]' | awk '{print $2}')#dnsdns=$(cat /etc/resolv.conf | grep nameserver | awk '{print $2}')echo ip:$ip,mask:$mask,broadcast:$broadcast,gateway:$gateway,dns:$dns