脚本如下:
[root@localhost shell]# vim 04.sh
#!/bin/bash ----标注解释器
for i in {1..254} -----写循环遍历1到254
do
ping -c2 -i0.3 -W1 192.168.4.$i &>/dev/null -----循环遍历1到265段看是否可以ping通,并把结果删除
if [ $? -eq 0 ];then -------如果以上的命令执行正确则说明该ip地址处于开机 ,当上条命令正确$?则等于0
echo "192.168.4.$i is up"
else
echo "192.168.4.$i is down"
fi
done
脚本的执行效果
[root@localhost shell]# sh 04.sh
192.168.4.1 is down
192.168.4.2 is down
192.168.4.3 is down
192.168.4.4 is down
192.168.4.5 is down
192.168.4.6 is down
192.168.4.7 is down
192.168.4.8 is down
192.168.4.9 is down
192.168.4.10 is down
192.168.4.11 is down
192.168.4.12 is up ....
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