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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.

4 ways to Create an Index in PostgreSQL

Indexes are essential tools for enhancing database performance, allowing the server to locate and retrieve specific rows significantly faster than scanning an entire table. By creating a structured path to your data, PostgreSQL can bypass repetitive row-by-row searches, which is…

how to create user in Postgresql – complete guide

In PostgreSQL, managing users effectively is more than just running a single command—it’s about setting up a secure, scalable hierarchy. Technically, PostgreSQL doesn’t distinguish between a “user” and a “group”; both are referred to as Roles. A User is simply…

3 ways To Change IP Address in Ubuntu

Configuring a stable network identity is a fundamental skill for managing any Linux environment. You might find yourself needing a static IP address to ensure your server remains reachable via SSH after a reboot, or perhaps you are troubleshooting a…

Why Your PostgreSQL Query Isn’t Using an Index

Indexes are the primary tools used to enhance database performance, allowing the server to retrieve specific rows much faster than scanning an entire table. However, simply creating an index does not guarantee that PostgreSQL will use it. Many developers are…

3 ways to Check When a Table Was Last Used in PostgreSQL

Monitoring table activity is a vital task for database administrators looking to optimize performance or clean up “bloat” from unused objects. PostgreSQL provides a built-in cumulative statistics system that tracks every scan, insert, and maintenance task performed on your relations.…

How to Integrate MCP Servers with Claude Skills

Imagine you have just connected a powerful Linear MCP to your workspace, but every Monday morning, you still find yourself manually explaining your team’s specific sprint planning methodology to Claude. Or perhaps you’ve integrated a Notion MCP, yet you still…