How to Use Python’s logging Module
Learn the basics of Python logging by configuring log output, choosing appropriate log levels, handling errors, and recording exception tracebacks.
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Inspect VPCs and Subnets with AWS CLI Commands
Use read-only AWS CLI commands to explore VPCs, list subnets, inspect routes and network ACLs, and verify public IPv4 assignment settings.
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PowerShell Functions and Parameters: Build Reusable Health Checks
Learn the basics of PowerShell functions and parameters through practical CPU, memory, disk, service, and file-system health-check examples.
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Bash Arrays: Create, Update, Append, and Loop Through Values
Learn the basics of Bash arrays by managing deployment targets, updating values, appending items, and safely looping through every element.
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SQL Window Functions: Row Numbers, Rankings, and Running Totals
Use SQL window functions to analyze customer orders while keeping every order row visible. Learn row numbering, rankings with ties, and customer or company-wide running totals.
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Regular Expressions in Python: Extracting and Validating Email Addresses
Practice Python regex techniques for finding email addresses in logs, validating email-like input, and avoiding common matching mistakes.
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AWS Resource Tagging Commands with the AWS CLI
Use the AWS CLI to manage AWS resource tags, verify tag changes, search by tag filters, and build a simple cost-allocation tagging workflow.
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Terraform Workspaces for Development and Production Environments
Use one Terraform configuration for development and production with workspaces, workspace-specific maps, separate state, and practical AWS examples.
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Finding and Safely Archiving Old Log Files with Bash
Use Bash find to locate log files by age, review matching paths, and copy old logs into a structured archive without modifying the originals.
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SQL Indexes and Query Performance in PostgreSQL
Understand how PostgreSQL indexes help queries find rows efficiently. This tutorial covers single-column and composite indexes, query plans, EXPLAIN ANALYZE, and common indexing mistakes.
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