シェルスクリプト:特定のIPアドレス範囲に対してpingで疎通確認
NUM4=$1
while [ ${NUM4} -le $2 ]
do
RES=ping 192.168.0.${NUM4} -c 1 -w 1 | tail -n2 | head -n1 | cut -d" " -f6 | sed "s/\%//g"
if [ ${RES} = "0" ]; then echo "192.168.0.${NUM4} ◯" else echo "192.168.0.${NUM4} ×" fi
NUM4=expr ${NUM4} + 1
done