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Mattias Geniar
Works at Nucleus
Lives in Boechout
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Mattias Geniar

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As it stands, the HTTPs “encrypted web” is built on trust. We use browsers that trust that Certificate Authorities secure their infrastructure and deliver TLS certificates (1) after validating and verifying the request correctly. It’s all about trust.…
As it stands, the HTTPs "encrypted web" is built on trust. We use browsers that trust that Certificate Authorities secure their infrastructure and deliver TLS certificates (1) after validating and verifying the request correctly. It's all about trust. Browsers trust those CA root certificates and in turn, they accept the certificates that the CA issues. (1) Let's …
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Exciting work is being done with regards to the WordPress auto-update system that allows the WordPress team to sign each update. That signature can be verified by each WordPress installation to guarantee you’re installing the actual WordPress update and…
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Some quick one-liners that can come in handy when using drush, Drupal’s command line interface. Place all websites in Drupal maintenance mode $ drush @sites vset site_offline 1 Place a specific multi-site website in maintenance mode $ drush -l…
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I’ve stopped watching the news a few months ago and it’s definitely a trend I’m planning to continue in 2017. We live in a world of information. Open Facebook and you see dozens of articles about topics your friends are interested in. Open Twitter and…
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Definetly. I stopped even reading the news in Internet. I just opening Facebook, blogs and so on...
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Our application is slow, let’s throw more CPU’s at it! If you work in IT, either as a developer or a sysadmin, you might’ve heard that phrase before. Something is slow, you throw hardware at it. Well, in a virtual environment (and what isn’t a VM…
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Apache HTTP authentication in .htaccess

There are plenty of guides that describe this already, but I find it frustrating to find a clear, concise write-up of what’s needed to get some simple username/password HTTP authentication to work just with .htaccess code. So, here’s the short version.…
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This is quite a fascinating document highlighting everything (?) Google does to keep its infrastructure safe. And to think we’re still trying to get our users to generate random, unique, passphrases for every service. Secure Boot Stack and Machine…
This is quite a fascinating document highlighting everything (?) Google does to keep its infrastructure safe. And to think we're still trying to get our users to generate random, unique, passphrases for every service. Secure Boot Stack and Machine Identity Google server machines use a variety of technologies to ensure that they are booting the …
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Help, my computer’s acting up! If you know a thing or two about computers, chances are you’ve got an uncle, aunt, niece or nephew that’s asked for your help in fixing a computer problem. If the problem wasn’t hardware related, it was most likely malware,…
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A quick mental dump in case I forget it again next time. First, check your PID: $ ps faux | grep 'your_process' 508 28818 0.0 0.3 44704 3584 ? Sl 10:10 0:00 \_ /path/to/your/script.sh Now, using that PID (in this case, 28818), check the environment…
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A minor annoyance after my Mac decided to auto-update to OSX 10.12.2: every time I wanted to SSH to a server, it kept prompting for my SSH key passphrase. $ ssh ma.ttias.be Enter passphrase for key '/Users/mattias/.ssh/id_rsa': It used to save that info…
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Welcome to a slightly later cron.weekly issue #60 for Sunday, December 25th, 2016. The holidays are messing with the timing a bit, so this issue is a bit later than usual. If you’re the kind of person that likes to celebrate Christmas, have a merry one. If you don’t care about that sort of things I …
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I just started working on a new Laravel project (it’s been a while), and this had me googling. For a second, I thought I had missing PHP extensions (like ‘mcrypt’) or other cryptographic configs I needed to tweak. But sometimes a solution is so obvious,…
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System Engineer @ Nucleus
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    System Engineer, 2007 - present
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RHEL 6/ CentOS 6: Slow SSH logins with DNS timeouts ~ Mattias Geniar
mattiasgeniar.be

If you're experiencing slow logins via SSH on a Red Hat Enterprise 6 or CentOS 6 system, it's probably caused by DNS that is taking too long