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: 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: 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: Setting up BGP on Vyatta

1 minute read

Vyatta is a Linux based distro that ease the set up of VPN, Routers, antivirus…. It has a really small footprint on your system as it only requires something...

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: 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: Monitoring a Server with Munin

2 minute read

Munin is a simple to configure tool that make real nice graph about your server status. It can actually deal with almost any aspect of your server (load aver...

Basic Apache Optimizations

1 minute read

Apache, the most popular web server, is a stable and reliable software for providing web pages to the world. But sometimes, it happens that Apache will strug...

Secure your Apache2 with mod-security

3 minute read

This article will show how-to install, configure and set up apache’s mod-security module on a debian based system. This was done on Ubuntu Dapper and should ...

How To: Optimize MySQL response time

2 minute read

High loaded website can get slow to respond when a lot of different visitors visit sites querying the same mysql database server, making it slow to respond.

nload, a network traffic analyser

2 minute read

nload is a ncurse based network traffic analyser. Being a ncurse based tools, you do not need to start X in order to use that software which is necessary whe...

How To: DPKG guide

1 minute read

This tutorial will bring you through dpkg, the debian package manager. As I introduce apt, I will now introduce dpkg and show how to search which files are i...

How To: APT guide

2 minute read

Apt is the debian tool to install, remove and search packages. It is a front-end to the dpkg package manager and offer easy searching, installing …, by using...

How-To: Postfix and Virtual Hosts

2 minute read

Postfix comes as the default mail server under ubuntu. By default, it is set such as it can basically send system notice mail to the user you predefined duri...

Mounting a fuse Filesystem from /etc/fstab

1 minute read

Earlier on, I showed how-to mount a remote filesystem with fuse, using a remote partition accessible by SSH. Since version version 2.4.0, it is possible to u...