Steps to find nslookup for multiple servers
1. store the server name in a file named file1.txt which located in /tmp/file1.txt
#cat file1.txt Server01 Server02 Server03 Server04 Server05 Server06 Server07
2. run for loop to find the nslookup , Please run the commands as it is .
OracleServer01:# for i in `cat /tmp/file1.txt`;