I've published a new HOWTO on my website:

Enrico already wrote about the Why (and the What, Who and When), so I'll just quote his conclusion and move on to the How.

I now have an XMPP setup which has all the features of the recent fancy chat systems, and on top of that it runs, client and server, on Free Software, which can be audited, it is federated and I can self-host my own server in my own VPS if I want to, with packages supported in Debian.

Something I was used to and which came as standard on wheezy if you installed acpi-support was screen locking when you where suspending, hibernating, ...

This is something that I still haven't found on Jessie and which somebody had point me to solve via /lib/systemd/system-sleep/whatever hacking, but that didn't seem quite right, so I gave it a look again and this time I was able to add some config files at /etc/systemd and then a script which does what acpi-support used to do before

The Guide to IP Layer Network Administration with Linux was conceived as a project to document and provide examples for the use of Linux-specific IP networking tools.

The book includes coverage of the following topics: network address translation (NAT), address resolution protocol (ARP), routing, and masquerading. There is a nascent section on bridging, although the focus of the documentation is the use of layer 3 Linux technologies.

Modeled after documents hosted at TLDP, this effort is a contribution to the Linux community undertaken of free will and in free time. I intend to release the completed guide to TLDP for inclusion in the documentation repository.

How to set up the ISC DHCP daemon with load sharing and failover capabilities.

The ESP8266 is the answer to “I want something with Wifi.” Surprisingly, there are a number of engineers and hobbyists who have not heard of this chip or have heard of it but don’t really understand what it is. It’s basically the answer to everything IoT to so many engineering problems that have plagued the hobbyist and commercial world alike.

Some notes about Ceph

The aim is showing that it is possible to create a low-cost storage, efficient and scalable, using opensource solutions. In the example below, I am using Ceph for scalability and reliability, combined with EnhanceIO to ensure very good performance.