IP Scan

功能:ping網段中的電腦,有成功的顯示ok

#!/bin/bash
c=10                                  (c變數指定迴圈開始的值
while [ $c -ne 21 ]                   (後面的21是迴圈停止的值
do 
   echo -n 140.137.217."$c"           (列印IP
   ping -c 1 140.137.217."$c" &>null  (將ping的結果丟掉
   if [ "$?" == "0" ]; then           (用回傳值判斷是否有ping到
     echo ok                          (有ping到就顯示ok
   else
     echo
   fi
   c=$(( $c+1 ))                      (c變數加1
done

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#!/bin/bash
c=10
while [ $c -ne 21 ]
do 
   echo -n 140.137.217."$c"
   ping -c 1 140.137.217."$c" &>null
   if [ "$?" == "0" ]; then
     echo ok
   else
     echo
   fi
   c=$(( $c+1 ))
done
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