This session is aimed at administrators who can't or won't use 3rd-party mail hosting (and who would?) but still need a reliable, spam- and virus-resistant mail server. A basic knowledge of BSD, smtp and dns is expected and required.

How is that for a title, right? I know, I know, they want me to call it “systemd” not “System D” or “Systemd” or anything else resembling a legitimate proper noun, but that doesn’t work quite so well for a sci-fi-esque sounding movie title as does the above.

Troll - Le débat Tanenbaum Torvalds

It has often been told how the Bell Labs law department became the first non-research department to use Unix, displacing a newly acquired stand-alone word-processing system that fell short of the department's hopes because it couldn't number the lines on patent applications, as USPTO required.

Document LaTeX de présentation du système NetBSD 7.0 dans le cadre d'une LP ASRALL (Licence Pro Administration Systèmes, Réseaux et Applications à base de Logiciels Libres).

En avant-propos, ce billet ne représente que ma démarche personnelle et mon humble point de vue sur l’utilisation des licences libres, correspondant forcément à ma façon d’agir, de faire, un point de vue duquel je suis volontiers prêt à discuter.

Tut's pfSense Archives - computerz.solutions

With many important things depending on time (think Kerberos), NTP is an important but often forgotten component of your network. Because the NTP daemon for Linux is relatively lightweight, it's rare for bugs to pop up in such a common service.

Vim is a highly configurable text editor built to enable efficient text editing. It is an improved version of the vi editor distributed with most UNIX systems. Vim is distributed free as charityware. 

My 10 UNIX Command Line Mistakes

OpenZFS Developers Summit 2016 - YouTube

Dans cet article, nous allons voir comment configurer deux serveurs pfSense en mode cluster afin d'assurer un service en haute-disponibilité. Il est à noter que pfSense est l'une des rares solutions open-source offrant des techniques de haute-disponibilité permettant de garantir que le firewall ne puisse pas être un point individuel de défaillance (SPOF).

If you run a Secure Shell login service anywhere which is accessible from the Internet, I'm sure you've seen things like these in your authentication logs:
Sep 26 03:12:34 skapet sshd[25771]: Failed password for root from

The benefits of getting to grips with Vim are immense in terms of editing speed and maintaining your “flow” when you’re on a roll, whether writing code, poetry, or prose, but because the learning curve is so steep for a text editor, it’s very easy to retain habits from your time learning the editor that stick with you well into mastery.

To play NetHack on this server, just telnet to alt.org (on normal port 23 or port 14321) or ssh to nethack@alt.org. Consider putty on Windows.

Il est essentiel de surveiller l’état général de votre serveur, c’est-à-dire les processus, les programmes, les répertoires, les fichiers, etc… C’est ce qu’on appelle le monitoring système. Le but est d’indiquer à l’application ce qu’on souhaite surveiller et elle effectuera des contrôles réguliers, et lorsqu’une erreur sera rencontrée, une alerte sera envoyée.

This mail archive is the complete (as far as I know) communication
between myself and the NetBSD core between December 15 (when they
removed all my NetBSD access) and the day OpenBSD was formed. It
actually goes a little further beyond that time, and includes mail
from a few other people involved in the negotiations.

I am a regular Linux system user. In Linux (especially CentOS), I am used to applying updates a few times a week using yum command, but how do I do that on my OpenBSD severer? How do I apply updates on OpenBSD operating system?

We usually don't see much of the scammy spam and malware. But that one time we went looking for them, we found a campaign where our OpenBSD greylisting setup was 100% effective in stopping the miscreants' messages.

Spawn your shell like it's 90s again!