linux-networking-dns-resolution

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dns-resolution

Contents

__Roadmap info from [ roadmap website ] (https://roadmap.sh/linux/networking/dns-resolution) __

DNS Resolution in Networking on Linux

Domain Name System (DNS) is a decentralized system used for converting hostnames into IP addresses, making it easier for users to access websites without having to remember specific numeric IP addresses. DNS resolution, therefore, is a critical aspect of networking in Linux.

On Linux systems, when an application needs to connect to a certain URL, it consults the DNS resolver. This resolver, using the file /etc/resolv.conf, communicates with the DNS server, which then converts the URL into an IP address to establish a network connection.

Below command is used to query DNS and fetch IP addresses: 

nslookup www.example.com

Or using dig command: 

dig www.example.com

Getting a good understanding of the DNS resolution process provides a solid base for tasks like network troubleshooting and web server setup on a Linux system.