阿铭每日一题 day 11 20180121
方法一:
1 #!/bin/bash 2 3 ip="192.168.0" 4 for i in `seq 1 254` 5 do 6 ping -c 2 $ip.$i |grep -q "ttl=" && echo "$ip.$i up..." >> /tmp/ping_ip.txt || echo "$ip.$i down..." >> /tmp/ping_ip.txt 7 done
方法二:
#! /bin/bash for siteip in $(seq 1 254) do site="192.168.0.${siteip}" #-c的意思ping的次数 #-n在输出数据时不进行IP与主机名的反查,直接使用IP输出速度快 #-W 等待响应对方主机的秒数 ping -c1 -W1 ${site} &> /dev/null if [ "$?" == "0" ]; then echo "$site is up" > /tmp/pingfile else echo "$site is down" fi done
day11参考答案:
#!/bin/bash ips="192.168.1." for i in `seq 1 254` do ping -c 2 $ips$i >/dev/null 2>/dev/null if [ $? == 0 ] then echo "echo $ips$i is online" else echo "echo $ips$i is not online" fi done