Blog about Web Programming and Electronics
The Vadnica Blog is a place where I share my experience with web programming and electronics. Here you will find articles about HTML, CSS, JavaScript, PHP and MySQL, as well as Arduino projects, Linux and news from the world of technology. I write in a simple, understandable language, so the content is accessible to both beginners and more experienced readers.
How HTTP Works (GET, POST, PUT, DELETE)
When we type a web address into the browser, a "conversation" takes place in the background between ...
How the tail and head Commands Work
Working with long log files and only interested in the last few lines? Or want to quickly peek at th...
A Free Banking Transaction Diary
Where does my money go? This is the question everyone asks themselves when they look at a bank state...
Zero-Knowledge: The Last Refuge of Online Anonymity
Today, more and more countries and platforms require age verification to protect children. This mean...
How a Cable Tester Works?
A cable is one of the most common things that breaks in a network and electronics — yet the last one...
Vadnica-pass: A Password Manager from First Lines to Open Source
The Geselnik project ("Geselnik" is a word coined by Lumo, and I decided to adopt it 😀), or simply a...
What Is Debugging and Why Every Developer Needs It
Debugging is the process of finding and fixing errors in program code. A bug is any unexpected behav...
What Is a JSON Web Token
A JSON Web Token (JWT) is an open standard for securely transferring data between two parties — most...
How rsync Works
Rsync (remote sync) is a tool for copying and synchronizing files between folders, disks, or compute...
How to Optimize Windows 11 for Speed
Over time Windows 11 becomes slower: programs install themselves in the background, unnecessary proc...
What Is CSV and Why Everyone Uses It
CSV (Comma-Separated Values) is the simplest format for storing tabular data in plain text. Each lin...
How PHP Security Works (Basics)
Web application security is one of the most important topics in PHP development. Any visitor can sen...