awk从nslookup输出获取IP和名称

编辑: 如果OP的输入文件中有IPs,下面的内容可能会对您有所帮助。

while read ip
do
    nslookup "$ip" | awk -v ip="$ip" '/name/{print substr($NF,1,length($NF)-1),ip}'
done < "Input_file"

说明: 这只是为了解释,为了运行代码,请仅使用上面的代码。

while read ip
    ##Starting a while loop which will read OP's Input_file which will have IPs in it. ip is the variable which has its value.
do
    nslookup "$ip" | awk -v ip="$ip" '/name/{print substr($NF,1,length($NF)-1),ip}'  
    ##using nslookup and passing variable ip value to it, to get specific IPs server name and passing it to awk then.
    ##In awk command setting up a variable named ip whose value is shell variable ip value and then checking if a line is having name in it if yes then printing the last column value leaving last DOT. 
done < "Input_file"
    ##Mentioning Input_file name here which should be passed.

请尝试下列操作。(考虑到您的输入文件上有服务器名)

while read ip
do
   nslookup "$ip" |  awk '/Name:/{val=$NF;flag=1;next} /Address:/ && flag{print $NF,val;val=""}'
done < "Input_file"

啊!它非常简单,同时通过awk手册我得到了awk变量即直接。。

$ for i in `cat File1.txt`;do nslookup $i | awk -v var=$i  '/name/{print var "\t", $4}';done

192.168.1.2  rob.example.com
192.168.1.3  tom.example.com
192.168.1.4  tony.example.com