Securing a CentOS 7 Apache Web server through Let's Encrypt – 2018/03/11

In: System administration Tags : Apache – CentOS 7 – SSL

I recently needed to secure the apache installation in a virtual private server running CentOS 7. I followed the instruction in this excellent tutorial by DigitalOcean. These instructions allow you to get up to the A rating for the Qualys SSL Server Test. To jump...
Read more...

Installing hadoop 2.7.1 from scratch (2015 version) – 2015/12/09

In: Big scale analytics Tags : Hadoop – Ubuntu – VirtualBox

In two previous posts I described the installation process for the 2.4.0 and the 0.20 releases of hadoop to the students of my class on on Big scale analytics. I opted for a VM-based solution, so that most of hardware and OS issues students would...
Read more...

Deferring your Gmail messages – 2015/08/13

In: General Tags : Gmail – deferring mail

I finally found out a way to defer messages in Gmail. I wanted to be able to remove a mail message from my inbox and let it automatically show up after N days, in order to directly implement the defer and delegate basic GTD actions...
Read more...

Executing JAR encoded MapReduce jobs in AWS either through Web interface or CLI – 2014/11/12

In: Big scale analytics Tags : AWS – MapReduce – Hadoop – Java

This tutorial explains how to use AWS in order to run MapReduce jobs written in Java end encoded into a JAR file, either using the Web-based console or through a command line utility. A basic knowledge of the Hadoop environment (release 2.4.0) and of the...
Read more...

Using TrueType fonts with pdflatex/livetex on Mac OS X – 2014/11/04

In: no category Tags : no tags

My University recently established a set of typographic conventions to be used when producing official documents such as presentations. A Powerpoint template was provided, but that was almost useless to me because I’m more a LaTeX guy. Aiming at building a beamer template compliant with...
Read more...

Installing hadoop 2.4.0 from scratch (2014 version) – 2014/10/09

In: Big scale analytics Tags : Hadoop – Ubuntu – VirtualBox

In a previous post I described how to set up a single-node hadoop cluster in an ubuntu server running on a virtual machine. Sort story: it’s related to my course on Big scale analytics. Refer to the original post for the details. As software upgrade...
Read more...

Installing ipython, virtualenv, numpy, scipy and all that on Mavericks – 2014/06/05

In: General Tags : python – ipython – virtualenv – numpy – scipy – Mavericks – scientific python

After upgrading my iMac to Mavericks I found out that my python environment was totally messed up, notably with ipython and virtualenv crashing at launch. I ended up to use my laptop to keep on with python development until I decided to perform a fresh...
Read more...

Installing hadoop from scratch. And I mean it – 2013/03/24

In: Big scale analytics Tags : Hadoop – Ubuntu – VirtualBox

This year I started a new course on Big scale analytics, and the first tool I introduced students to is, not surprisingly, Hadoop. Having pointed out that this tool is useful when run on a significant cluster, I nonetheless wanted students to be able to...
Read more...

Let me introduce... my blog – 2013/01/19

In: General Tags : Blog – Jekyll – Bootstrap – Markdown – Liquid

I decided to set up this blog mostly with the aim of writing down install instructions as neat as possible for the software I use, so I (hopefully) can save time when setup a new computer. So, why don’t describe the technology behind the blog...
Read more...