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In this article I will show how to prevent brute force attacks with Fail2ban against your SquirrelMail Web login using the Squirrel Logger plugin.

This guide explains how to set up software RAID1 on an already running Debian Lenny system. The GRUB bootloader will be configured in such a way that the system will still be able to boot if one of the hard drives fails (no matter which one).

This guide explains how you can configure your SquirrelMail webmail application on an ISPConfig 3 server so that email users can change their passwords themselves directly in SquirrelMail.

This tutorial explains how you can install the Google Chrome browser on Ubuntu 9.04 and how to enable the Adobe Flash plugin in it. Please note that Google Chrome for Ubuntu is still in alpha state and should not be used on production systems.

This howto was written when I needed to run some php based web applications and the only system around was FreeNAS. Although many people are using php and MySQL on a FreeNAS box successfully I couldn't find any simple tutorial for the purpose, so I wrote one in case anyone needs it.

This tutorial explains how to install and use Back In Time on an Ubuntu 9.04 desktop. Back In Time is a simple backup tool for Linux inspired from "flyback project" and "TimeVault". The backup is done by taking snapshots of a specified set of directories.

Sugar is the desktop environment that is used for the "One Laptop per Child" (OLPC) netbooks. It can also be installed on normal computers. This guide shows how you can install Sugar on an Ubuntu 9.04 desktop.

Asterisk is one of the best telephony solutions which is free to use. There are others such as yate that provide same type of solutions and even more custom ones. Due to the easy of implementation Asterisk has become more popular than anything else. Asterisk is very easy to use and lots of open source and closed source panels provide a GUI for it.

This tutorial explains how to install and use luckyBackup on an Ubuntu 9.04 desktop. luckyBackup is an application for data back-up and synchronization powered by the rsync tool. It is simple to use, fast (transfers over only changes made and not all data), safe (keeps your data safe by checking all declared directories before proceeding in any data manipulation ), reliable and fully customizable.

The following will install and configure DRBD, OpenAIS, Pacemaker and Xen on OpenSUSE 11.1 to provide highly-available virtual machines. This setup does not utilize Xen's live migration capabilities. Instead, VMs will be started on the secondary node as soon as failure of the primary is detected. Xen virtual disk images are replicated between nodes using DRBD and all services on the cluster will be managed by OpenAIS and Pacemaker. The following setup utilizes DRBD 8.3.2 and Pacemaker 1.0.4. It is important to note that DRBD 8.3.2 has come a long way since previous versions in terms of compatibility with Pacemaker. In particular, a new DRBD OCF resource agent script and new DRBD-level resource fencing features. This configuration will not work with older releases of DRBD.

LAMP is short for Linux, Apache, MySQL, PHP. This tutorial shows how you can install an Apache2 webserver on a CentOS 5.3 server with PHP5 support (mod_php) and MySQL support.

MultiTail lets you view one or multiple files like the original tail program. The difference is that it creates multiple windows on your console (with ncurses). It can also monitor wildcards: if another file matching the wildcard has a more recent modification date, it will automatically switch to that file. That way you can, for example, monitor a complete directory of files. Merging of two or even more log files is possible.

This tutorial shows how you can set up a Kubuntu 9.04 desktop that is a full-fledged replacement for a Windows desktop, i.e. that has all the software that people need to do the things they do on their Windows desktops. The advantages are clear: you get a secure system without DRM restrictions that works even on old hardware, and the best thing is: all software comes free of charge. Kubuntu 9.04 is derived from Ubuntu 9.04 and uses the KDE desktop instead of the GNOME desktop.

This howto describes how an Ubuntu 9.04 Samba server is integrated with Active Directory, and how to use Winbind; the Linux server sees the domain users and groups transparently. I assume that your Ubuntu server is installed and ready to be configured with Samba.

This tutorial shows how you can set up a gOS 3.1 Gadgets desktop that is a full-fledged replacement for a Windows desktop, i.e. that has all the software that people need to do the things they do on their Windows desktops. The advantages are clear: you get a secure system without DRM restrictions that works even on old hardware, and the best thing is: all software comes free of charge. gOS is a lightweight Linux distribution, based on Ubuntu 8.04, that comes with Google Apps and some other Web 2.0 applications; gOS 3.1 Gadgets uses the GNOME desktop.

This tutorial shows how you can prevent unlimited login attempts and hence brute force attacks against your SquirrelMail web login by using fail2ban.

This document describes how to install a PureFTPd server that uses virtual users from a MySQL database instead of real system users. This is much more performant and allows to have thousands of ftp users on a single machine. In addition to that I will show the use of quota and upload/download bandwidth limits with this setup. Passwords will be stored encrypted as MD5 strings in the database.

Cherokee is a very fast, flexible and easy to configure Web Server. It supports the widespread technologies nowadays: FastCGI, SCGI, PHP, CGI, TLS and SSL encrypted connections, virtual hosts, authentication, on the fly encoding, load balancing, Apache compatible log files, and much more. This tutorial shows how you can install Cherokee on an Ubuntu 9.04 server with PHP5 support (through FastCGI) and MySQL support.

If you are running a webserver you might have faced the problem already: somewhere on your server is a vulnerable contact form or CMS system written in PHP that gets abused by spammers to send emails trough your server. If you have more than a few websites, it is a pain to detect which of the sites is vulnerable and sends the spam emails. This tutorial explains the installation of a small wrapper script which logs email messages sent trough the PHP mail() function.

recordMyDesktop is a desktop session recorder for GNU/Linux that attemps to be easy to use, yet also effective at its primary task. It produces files using only open formats. These are theora for video and vorbis for audio, using the ogg container. This tutorial shows how to install and use recordMyDesktop on Ubuntu 9.04.