How to Manage EC2 Security Group Rules with AWS CLI
Use AWS CLI to inspect and safely update Amazon EC2 security group rules, including HTTPS, SSH, and private application traffic.
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Terraform Modules: Build Reusable Infrastructure for Multiple Environments
Learn how Terraform modules package reusable AWS infrastructure, pass environment-specific variables, expose outputs, and deploy consistent resources across multiple environments.
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Bash Exit Statuses and Conditional Command Execution
Understand Bash exit statuses and use them to control deployment scripts. This beginner tutorial covers if statements, &&, ||, pipelines, and stopping safely after failures.
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How to Use INSERT, UPDATE, and DELETE in SQL
Practice changing database table data with SQL INSERT, UPDATE, and DELETE statements, including safe filtering with WHERE and customer record examples.
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Python Decorators: Add Logging Around Functions
Build Python decorators that log function calls, results, and failures while keeping the original business logic unchanged.
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How to Start and Stop EC2 Instances with the AWS CLI
Use AWS CLI commands to start, stop, inspect, and wait for EC2 development instances, with examples for single and multiple instance IDs.
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Using Bash Environment Variables in Deployment Scripts
Learn to use Bash environment variables for deployment settings, distinguish shell variables from exported variables, and safely validate secrets without exposing them.
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How to Sort and Limit SQL Query Results with ORDER BY and LIMIT
Learn how to sort SQL results with ORDER BY and restrict the number of returned rows with LIMIT. Includes practical examples using filters, dates, and order totals.
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How to Read CSV Files in Python and Calculate Inventory Value
Build a beginner-friendly Python program that reads product data from a CSV file, calculates inventory values, tracks totals, and identifies low-stock items.
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Audit an IAM User’s Policies and Groups with AWS CLI
Use AWS CLI commands and a reusable Bash script to inspect the policies, groups, and permissions boundary associated with an IAM user.
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