title: How to get hostname from IP (Linux)?
body: <p>I'd like to get remote machine/hostname through IP Address. 
  I found lots of answer such as nslookup, host, resloveip, etc..
  but I still can't get hostname from my target machine(cent OS, ubuntu etc...)
  It seems need to register to DNS server?</p>
  
  <p>I have a machine named <strong>test</strong> and using IP <strong>10.1.27.97</strong></p>
  
  <p>but I used the method above still can't not get "<strong>test</strong>"</p>
  
  <p>Does anyone can help me to get the hostname form IP Address?</p>