Using nslookup on Raspberry Pi for Network Troubleshooting

Introduction: In this article, we will explore the use of nslookup on the Raspberry Pi platform for network troubleshooting. Nslookup is a powerful command-line tool that allows users to query the Domain Name System (DNS) to obtain information about domain names and IP addresses. Understanding how to use nslookup effectively can help Raspberry Pi users diagnose and resolve network-related issues.

Examples:

1. Basic Usage: To perform a simple DNS lookup on the Raspberry Pi, open the terminal and type the following command:

   nslookup example.com

   This command will return the IP address associated with the domain name "example.com".

2. Reverse Lookup: You can also perform a reverse lookup using nslookup to find the domain name associated with a specific IP address. For example:

   nslookup 8.8.8.8

   This command will return the domain name associated with the IP address 8.8.8.8, which in this case is "dns.google".

3. Querying Specific DNS Servers: By default, nslookup uses the DNS servers configured on your Raspberry Pi. However, you can specify a different DNS server to query. For instance:

   nslookup example.com 8.8.4.4

   This command will use the Google DNS server (8.8.4.4) to perform the DNS lookup for the domain name "example.com".