After a more thorough analysis, I believe that I have now a clear image of what happened to . It appears that a hacker introduced itself into our web site through an insecure WordPress plugin. The security defect has been corrected relatively quickly, but it left a wide open gap during a few days. The… Read More
This appears to be one of the most imprecise errors a web server can through at you. More or less, it means “I tried but I can’t serve and I can’t help with more precise information”. People and forums tend to say that this may be related to database issues or .htaccess issues. But not… Read More
So, it had to happen one day. has been hacked. Nothing very terrible, but a few bad hours for an administrator. The site to be rebuilt in a matter of hours. Passwords to be changed. Several hours lost for nothing. There wasn’t much to steal (the users are not very many). But it is impossible… Read More
Designed to help in a computer science and algorithms teaching course, these are great ideas of algorithm descriptions using only simplified drawings and no word (styled like Ikea assembly instructions). I love them. Idea-instructions.
It seems that I can help some readers with a library of information about GDPR, the new (in May 2018) European Regulation about Privacy and the handling Personal Data on web sites. It may appear as quite complex. So, I collected a list of those articles I found most interesting for a first reading/introduction (aimed at… Read More
I have several web sites wirtten with WordPress and I needed to comply with the new GDPR European regulation (new in May 2018). After a few hours of work to find how to do this right… I decided to share my experience and show the steps I went through; not very difficult, but rather lenghty,… Read More
Our computers have more and more USB ports, and we have so many storage drives plugged into them (USB drives, USB thumb drives, memory card readers, etc.) that it is somewhat difficult to recognize them all when they are displayed on the desktop. In the example below, you wonder which one is which among all… Read More
A few years ago I had written about Guillermo Luijk’s technique to remove completely noise from digital photos. We know that this is a difficult task, but his solution is relatively simple: Shot the scene in a correct exposure according to our usual workflow; Repeat the shot now reducing shutter speed by 4 f-stops that… Read More
A few versions of this text editor (sometimes) loved by many software programmers / Archive of old Emacs versions.
In the past, I have been known to push for the use of two-factor authentication for as many web sites as possible. Through the use of an app running on my smartphone, I can provide a code that is much safer than the SMS text message sent by some web sites and that can be… Read More
When CrashPlan announced the end of its unlimited backup service, I had to actively seek a new solution asking myself the question of how to provide two services I was previously (more or less) getting from this provider: Backups Synchronization between several machines (several PC and several iPhone) CrashPlan easily provided the backup feature despite… Read More
My hosting company (OVH.com) is very cautious and does not push me into upgrading silently PHP on the servers. But I was still in PHP5 when I noticed that I could go up to PHP7. WordPress informs me that the simple upgrade could improve speed by a ratio of 2x to 3x. So, it was… Read More
Finally, it did not take me very long to find a solution to the crashes of my CrashPlan backup solution. And, it was right on the web site of the software editor, where I could find all the directions to follow if CrashPlan crashes unexpectedly. I just doubled the memory size made available to the… Read More
For some time already (a few years, actually), I use and I recommend CrashPlan as an online backup solution. My photos are sent to a US backup server to protect them against some seriously bad event in my home (a fire? the theft of my computer hardware?) which would leave me without any backup locally… Read More
This is a game for non-gamers. The aim is to reach a total of 2048 on a 4×4 grid. The mean is to align two identical figures to add them: 2 + 2 = 4. You can play 2048 on iOS (iPhone, iPod, iPad, etc.) or on the web. Please, before you start, make sure… Read More
Little administrative message for those of you you know me more personally than through a mere Internet connexion: I just moved which is a relatively good explanation for some of the minor service disruptions observed on the Roumazeilles.net web site these recent days. As a matter of fact, there is no obvious difference for the… Read More
You can’t have too many fonts for your computer. Or can you? Actually, I am trying to make sure that you will get much more than you can swallow here: tens of thousands of character fonts. Not only a bunch of them, but two sources of the nicest kind. FontPark is nothing less than a… Read More
The other day, I was talking with Frank about exceptional software programmers able to influence notably a whole company by their own activity or impossibly better than the rest of the programming crowd. This person is the one you need to hire when you have an exceptional entrepreneurial project or the one you want to… Read More
Just at the surface of a 3D fractal volume, happen very astonishing things. Surface detail from subBlue on Vimeo.
You know that you’re a computer dinosaur when you discover that a computer program you started with is reaching its end-of-life after… 30 years. The Kermit Project is canceled, effective 1 July 2011. I think that I actually started using Kermit on a Vax 11/780 computer from Digital Equipment Corporation to exchange data between various… Read More