shell编程 测试单个主机或网段主机存活

今天中午的作业，写shell脚本，使用ping判断指定IP或者IP端内的主机存活。

只接受规定的IP格式输入和IP段输入(例如：192.168.2.88 或 192.168.2.)注意，写IP段的时候后面有个点...脚本简陋...看官将就一下吧；上代码：

#!/bin/bash

read -p "Please input ip:(192.168.0.22) or (192.168.0.)" Ip

Test=`echo $Ip|grep "\<[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\$"`

Test1=`echo $Ip|grep "\<[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.\$"`

#echo "a IP is: $Test"

#echo "IP.is $Test1"

if [[ -z $Test && -z $Test1 ]];then

echo "input error!"

exit 1

elif [[ -n $Test ]];then

for i in `seq 1 4`

do

Cut=`echo $Test|cut -d"." -f$i`

if [ $i -eq 1 ];then

if [ $Cut -gt 223 -o $Cut -lt 1 ];then

echo "input $Test ---->> $Cut invalid"

exit 2

fi

else

if [ $Cut -gt 254 ];then

echo "input $Test ---->> $Cut invalid"

exit 2

fi

fi

done

if ping -c 2 -W 1 $Test &> /dev/null ;then

echo "Have $Test"

else

echo "No $Test"

fi

else

for i in `seq 1 3`

do

Cut=`echo $Test1|cut -d"." -f$i`

if [ $i -eq 1 ];then

if [ $Cut -gt 223 -o $Cut -lt 1 ];then

echo "input $Test1 ---->> $Cut invalid"

exit 2

fi

else

if [ $Cut -gt 254 ];then

echo "input $Test1 ---->> $Cut invalid"

exit 2

fi

fi

done

declare -i Num

declare -i Fail

Num=0

Fail=0

for i in `seq 1 10`

do

if ping -c 1 -W 1 ${Test1}$i &> /dev/null ;then

echo "Have ${Test1}$i"

Num=$((Num+1))

else

Fail=$((Fail+1))

echo "No ${Test1}$i"

fi

done

echo "Host online have $Num ."

echo "Host no online have $Fail ."

最后一个for循环，我嫌多，只写了10个值，有兴趣的哥们，自己改 seq 1 10改成1 254即可...还有关于a类b类c类网，由于本人网络方面知识的欠缺，所以判断的值，估计挺不正确的，列位就谅解一下吧....