Tech tips

• Command · Beginner

  Servers & setup

  Install and secure Nginx on Ubuntu 24.04

  You have a brand-new Ubuntu server (VPS) and want to host a website on it over HTTPS, the right way.

  • Bash / terminal
  • Nginx
• Command · Beginner

  Servers & setup

  Install a PHP extension (intl, gd, zip…) on Ubuntu or Docker

  Your app shows “Class "Normalizer" not found” or complains about a missing PHP extension.

  • Bash / terminal
  • Dockerfile
• Command · Intermediate

  IT maintenance

  Slow or unstable Windows PC: 3 commands to repair the system

  Blue screens, crashing apps, stuck updates: Windows system files may be damaged.

  • PowerShell
• Tip · Beginner

  Hardware

  Check the health of a hard drive or SSD

  The computer slows down, files become unreadable or the drive makes noise: is it about to fail?

  • PowerShell
  • Bash / terminal
• Command · Beginner

  Software

  Update all your Windows software in one command with winget

  Browsers, PDF readers, archive tools… updating each program one by one takes time, and anything you miss is a security hole.

  • PowerShell
• Best practice · Intermediate

  Object-oriented programming

  OOP: favour composition over inheritance

  Your classes inherit from each other over several levels and every new feature forces yet another subclass.

  • TypeScript
  • PHP
  • Python
• Best practice · Beginner

  Best practices

  Never store a password in plain text: hash it with Argon2

  Your users' passwords are stored in plain text, MD5 or SHA-1: if the database leaks, they can be used right away.

  • PHP
  • TypeScript
  • Python

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