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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
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...
ReadJanuary 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...
ReadJanuary 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...
ReadJanuary 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...
ReadJanuary 17, 2025
Bring a Git Subfolder and History to New Repo
Bring a git subfolder and it's history over to start a new repo: https://docs.github.com/en/get-started/using-git/splitting-a-subfolder-out-into-a-new-repository I did this for a repo and it was...
ReadJanuary 12, 2025
Accessing the Docker Linux Virtual Machine
Docker runs on linux natively, but Docker Desktop works on a Mac by creating a virtual machine, installing Linux, and then running on top of that. So, to do some things, like intercepting network...
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