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.

Behind the Scenes: What Happens When You Enter Google.com?

It is perhaps the most frequent action on the internet: typing google.com into a browser and hitting Enter. While it feels instantaneous, this simple action triggers a complex cascade of events spanning networking protocols, hardware routing, and browser rendering engines.…

How to Check and Verify CA Certificates in Ubuntu Linux

In the world of Linux security, Certificate Authorities (CAs) act as the trusted third parties that validate the identities of websites, servers, and clients. Ubuntu comes with a pre-installed bundle of trusted root certificates, but knowing how to check, verify,…