April 23, 2025

Check Whether an AWS VPC is Being Used

If you need to check whether a VPC is being used -- you do not want to delete a VPC if it is being used, you can double-check it with this command:

March 10, 2025

Ippsec's nmap command

YouTube star ippsec's favorite nmap for initial recon:

March 10, 2025

Cloudflare API Example in bash/curl

Cloudflare API Example in bash/curl. This particular script was a proof-of-concept to disable a cache rule.

February 3, 2025

Git Config Backup

February 3, 2025

Why You Need to Lock Read Rows Inside an SQL Transaction

This is hard for me to remember. I feel like START TRANSACTION should be enough to prevent anything going wrong while that transaction is active for my session. Whatever value I...

January 25, 2025

ARP in Networking

ARP (Address Resolution Protocol) is a fundamental networking protocol. It translates IP addresses into their corresponding MAC address. Find your network interface: ifconfig...

January 19, 2025

Promises in Three Languages

Three ways to handle concurrent API requests that resolve when all are done, but can run concurrently. In other words, if you have three requests and takes 2 seconds, takes 1 second takes 2...

January 19, 2025

Concurrency vs Parallelism

As always: This is for my own understanding. Please don't assume it is 100% correct. Concurrency is handling multiple tasks during the same time. Parallelism is actually doing tasks at the same...

January 18, 2025

Things to Know About Concurrency

Things to know about Concurrency: Why it's important: Devops involves working with systems that might involve multiple processes, threads, or containers running concurrently. Understanding basic...

January 18, 2025

The `awk` Command

To determine whether a website is using only IPv6 or if it supports both IPv4 and IPv6 (dual stack), you can do: If only the IPv6 ping is successful, the site might not support IPv4. If...