# Linux, Devops, Scripting, Cats and various things come to my mind
// also on this box: ./practice, ./tools and ./games
Ever wondered who’s logging into your Linux box? Whether it’s a critical production server or a personal VPS, it’s smart to get notified…
cat stop-intruders-in-their-tracks-get-an-email-every-time-someone-logs-in-via-ssh.md →One common challenge when using emails to communicate with clients is not just confirming that an email address is valid, but ensuring that…
cat stop-guessing-the-web-api-that-verifies-and-confirms-if-an-email-address-exists-and-is-deliverable.md →In the glorious world of computer science, we have many elegant ways to sort data — quicksort, mergesort, heapsort. They compare, they…
cat stalin-sort-the-sorting-algorithm-that-purges-dissent.md →When working with AWS RDS and connecting via IAM authentication, you’ll often run into a frustrating limitation: the generated…
cat how-to-maintain-an-aws-rds-connection-even-after-the-token-has-expired.md →Yesterday, I had a small failure. I’m the kind of person who makes many small mistakes but also often feels quite confident that things…
cat oops-i-did-it-again-diffing-my-bash-functions-to-find-my-mistakes.md →If you often work in the macOS Terminal and want to quickly draft an Outlook email — complete with body text and file attachments — this…
cat automate-outlook-email-creation-on-macos-with-body-text-and-attachments-from-terminal.md →When working with logs, scheduling, or data pipelines, you often need to convert timestamps from one timezone to another. The date command…
cat converting-timestamps-between-timezones-on-linux.md →If you work with cryptocurrency data, you often need to automate downloading historical price data. In this guide, you’ll learn how to…
cat downloading-historical-cryptocurrency-data-using-python-and-pandas.md →If you use macOS and spend a lot of time in the terminal, you might be surprised to learn that you can lock your screen with a simple Bash…
cat how-to-lock-your-mac-screen-from-the-command-line-and-why-you-should.md →Nmap is one of the most powerful tools for discovering devices and services on a network. Whether you’re assessing security…
cat how-to-use-nmap-to-scan-subnets-for-common-ports.md →
