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UNIX and Linux stuff

Tips and tricks

Indispensable UNIX utilities

A list of useful small command-line programs including but beyond those required by POSIX, and where to get them.

Best practice for writing software

My priorities for good utility programs, good documentation and good diagnostic messages.

A graphical git cheat sheet

Usage of the git version control system in one diagram

A close look at ALSA

The concept behind the Advanced Linux Sound Architecture, its configuration and a troubleshooting tool.

Older tutorials

Keeping order with MySQL
What's the deal with UNIX?
Using the shell bash
Some useful commands
The editor emacs

My software projects

(More specialist software can be found in other sections of my site.)

Automated YAML file processing

A general-purpose program for processing data structures from YAML files.


My reimplementations and improvements of utilities invented by others.

Perl snippets

Helpful small functions for Perl programmers

All software on my site

Overview of the software on my website.

Forks and patches

Enhancements for the links browser

Fixes and improvements for the text-based and graphical browser links

Personal patches for the privoxy privacy proxy

Enhancements for the well-known web privacy proxy

An advanced search patch for hexedit

Add bit-mask searching to Pascal Rigaux's hexadecimal editor

Other patches

Some older fixes and enhancements for projects that are unmaintained or do not accept patch submissions.

Recreational UNIX

OS learning curves

The learning curves of different operating systems are not what you might expect

Nethack for dummies

A non-expert's introduction to the Nethack dungeon game.