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SQL Indexes and EXPLAIN — How to Optimize Database Queries
Complete beginner guide to understanding B-tree indexes, reading EXPLAIN query plans, avoiding full table scans, and knowing when indexes hurt performance.
btop — Modern Terminal Resource Monitor
Complete beginner guide to btop, monitoring CPU cores, memory, swap, disk I/O, network bandwidth, process inspection, and sending kill signals from your terminal.
Nginx — High-Performance Web Server & Reverse Proxy
Install, configure, and operate Nginx on Linux for serving static sites, proxying application servers, and managing SSL/TLS certificates.