How-to's

How to display beautiful math formulas on your website with MathJax JavaScript library

How to fix “Error Code: 1290. The MySQL server is running with the --secure-file-priv option so it cannot execute this statement” error

How to extract files from zip archive in Linux command line

How to extract files from different tar archives in Linux command line

How to fix PuTTY's server protocol violation connection error

How to call your native functions in Android NDK application from Java

How to make POST and other types of HTTP requests and add custom HTTP headers with file_get_contents function in PHP

How to use NGINX to route HTTP and WebSocket requests

How to use WebSockets in web browser with JavaScript

How to pretty print XML documents on Linux

How migrate from Upstart scripts to systemd on CentOS 7

How to run your PHP or Bash script as root in the most secure way

How to use modern MaxMind GeoIP API in PHP

How to use JNIEnv::FindClass on Android and what you should know about it

How to open URL in web browser from Android NDK application with Java or native code

How to update multiple rows within a single query in MySQL

How to split YAML files and include them into each other with PHP

How to use web browser local storage in JavaScript and what you should now about it

How to protect your website forms from unwanted spam bots

How to create a well-crafted RSS feed for a website and configure it property