David Cao

David Cao

David is a Cloud & DevOps Enthusiast. He has years of experience as a Linux engineer. He had working experience in AMD, EMC. He likes Linux, Python, bash, and more. He is a technical blogger and a Software Engineer. He enjoys sharing his learning and contributing to open-source.

Understanding DNS records with Examples

DNS is short for Domain Name System. It is simply a database that links meaningful names (known as hostnames), such as www.howtouselinux.com, to a specific IP address, such as 185.230.63.171. Each device connected to the Internet has a unique IP…

Understanding Traceroute Command with Examples

The traceroute command is used to trace the exact routing hops and the path that the packets take to the remote destination. This command’s purpose is to test and display the communication link between a source host and a destination…

How Nodetool Repair Works in Cassandra?

In Cassandra, data in a replica can become inconsistent with other replicas due to the distributed nature of the database. Node repair corrects the inconsistencies so that eventually all nodes have the same and most up-to-date data. It is an…

Exploring EDNS with Examples

EDNS stands for Extended DNS. EDNS gives us a mechanism to send DNS data in larger packets over UDP. The most popular implementation of EDNS is DNSSEC. History of EDNS Traditional DNS responses are typically small in size (less than…

20 Advanced Linux Find Command Examples

Linux find command is a powerful tool that can be used to locate and manage files and directories based on a wide range of search criteria. This means that we can provide it with a set of directories (or files)…

Exploring DNS Port with Examples

DNS port is confusing for many people. In this article, we’ll describe how DNS works, and what DNS port numbers are used for DNS protocol. Port Usage TCP port 53: Large DNS responses (TCP is used when the DNS response…

Understanding TCP Connection with Examples

TCP is defined as a connection-oriented and reliable protocol. We will check out how TCP connection works in this article. How TCP Connection Works? TCP allows for the transmission of information in both directions. This means that computer systems that…