Symptom
You are given an IP address and customer asked you to find the hostname from the IP address.
Solution
1. host IP-ADDRESS
host 192.168.1.1
2. dig -x IP-ADDRESS
dig -x 192.168.1.1
3. nslookup IP-ADDRESS
nslookup 192.168.1.1
4. ping -a IP-ADDRESS
ping -a 192.168.1.1
