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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.

How to Migrate a WordPress Website to AWS Lightsail

Amazon Lightsail is AWS’s simplified hosting service, and it is one of the easiest ways to run WordPress in the cloud. Unlike the full EC2 + RDS approach, Lightsail bundles a pre-configured WordPress instance, predictable flat-rate pricing, and a friendly…

How to Fix CVE-2026-31431 (“Copy Fail”)

Overview CVE-2026-31431, nicknamed Copy Fail, is a local privilege escalation vulnerability in the Linux kernel, published on 29 April 2026 alongside a public proof-of-concept exploit. It allows an unprivileged local user to escalate to root. The flaw lives in the…

Why Ansible SSH Logins Do Not Appear in last command

When administrators begin auditing Ansible activity on Linux servers, one question comes up frequently: if Ansible connects over SSH, why does that connection not appear in the output of the last command? A related concern is whether Ansible establishes a…