How-To: Fight SPAM with Postfix RBL

2 minute read

Spam, spam everywhere! If you are hosting your own mail server, fighting spam can become tricky. Antispam solutions do catch a fair amount of them, but still...

How-To: using Python Virtual Environments

1 minute read

A nice thing about Python is that there is tons of modules available out there. Not all those modules are readily available for your distro and even if there...

How-To: WiFi roaming with wpa-supplicant

1 minute read

wpa_supplicant can be used as a roaming daemon so you can get your system to automatically connect to different network as you are going from one location to...

How-To: tail multiple files with multitail

1 minute read

Many times you will end up tailing multiple files simultaneously. There is a sweet linux utility called multitail that will let you tail multiple files at th...

How-To: Reboot on OOM

2 minute read

Ever had your linux box getting Out of Memory (OOM)? Cleaning up after the OOM killer kicked in to find out that even though OOM killer did a decent job at t...

Mastering Top

3 minute read

top is most likely one of the most known Linux command and also one of the most used one, however most people do not take full advantage of its capabilities.

How-To: Change boot runlevel with Grub2

1 minute read

Linux start up behaviour is driven by the so-called runlevels. It will use the default value provided in /etc/inittab for some systems (Debian…), or /etc/ini...

How-To: Tmux a Terminal Multiplexer

4 minute read

As a sysadmin, most of my time is spent working on remote machines and different task. tmux is a terminal multiplexer, meaning it allows you to run multiple ...

How-To: Disable pulseaudio and sound in GDM

less than 1 minute read

If like me you use MPD as a service daemon to listen to music, you might be annoyed anytime GDM start a pulseaudio process which prevents MPD from accessing ...

How-To: Changing the default text editor

less than 1 minute read

There is a few software that will use the editor command to find out what text editor to use. Example commands will be dch to add a new .deb changelog entry,...

How-To: Import/Export GPG key pair

1 minute read

This tutorial will show how you can export and import a set of GPG keys from one computer to another. This way, you can sign/encrypt the same way one differ...

How-To: Customizing SSH client

1 minute read

SSH is great. There is so many thing you can do with it other than just a remote secure shell like X forwarding, port forwarding, authenticate using a privat...

How To: booting another Grub from Grub

1 minute read

Chainloading an operating system allows grub to boot an opearating system’s boot loader. This is commonly used to boot Windows for instance.

How-To: Customize your Ubuntu Live CD

2 minute read

Live CD are great, they let you try out a distribution without installing it. They allow you to run your favorite distribution on any computer and on the top...

How-To: Install Ubuntu on LVM partitions

5 minute read

LVM (Logical Volume Manager) is a great piece of software which allow you to deal with Logical Volumes. Using LVM along with ext3 filesystem, you are allowed...

How-To turn off beep from virtual console

1 minute read

Linux offers a great tool: Tab Completion. With tab completion, you can easily navigate through your filesystem, find command names you forgot the exact name...