The Essential Guide to Application Logging: From Basics to Production
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Introduction: The Black Box Problem Your application crashed in production at 3 AM. Users are complaining. You SSH into the server and... nothing. No clue what happened, when it happened, or why. This is what happens without proper logging. Logging is your application's flight recorder. When something goes wrong (and it will), logs are your only way to understand what happened. In this guide, you'll learn: What logging is and why it's critical Log levels and when to use them How