Documentation
Browse our growing library of practical tutorials covering Linux, MySQL, PHP, Perl, Python, and XML.
Linux
Practical guides to the Linux operating system, from the command line to system administration.
MySQL
Learn relational databases with MySQL, from simple queries to advanced performance tuning.
PHP
Server-side scripting with PHP: forms, databases, and web application fundamentals.
Perl
Text processing and scripting with Perl: regular expressions, file I/O, and CPAN modules.
Python
Modern Python programming: clean syntax, powerful data structures, and a rich standard library.
XML
The Extensible Markup Language: structure, validation, querying, and transformation.