Bootstrapping a secure terraform AWS environment
Please find the source code at https://github.com/rosselm/secure-terraform
Wifi Adapter based on rtl8812au chipset on recent Linux
It’s not easy! At least it wasn’t for me on my latest debian buster. Unless you grab a lot of different pieces of information and make it work of course. Let me share the endeavor. Building the driver. After a lot of attempts with outdated source code I managed to get my adapter blinking ( Read More …
Broadcom chipsets (shitsets?) on Linux
Getting broadcom chipsets working on Linux (wifi/bluetooth, separate/combined) is a pain. Each time again as they are non-free as by default not included. You got it working once, but don’t remember how it went if you try a new distro. Tired of going on a google session everytime again, I decided to write it down. Read More …
Why i ditched onenote, evernote, ‘whatever’ note for Joplin
I’m not at all affiliated with Joplin as I just stumbled upon this beautiful piece of software a while ago. In a nutshell it works on the 3 major platforms, it synchronises with the major cloud providers and even with owncloud. And last but not least it works from the command line! For a professional Read More …
Playing with 555 timer and 4017 decade counter
I graduated long time ago as electronics engineer but eventually ended up in software engineering. Recently I wanted to start playing again a bit with electronics and decided to build some mundane projects just to try to understand popular components. In this post I show the popular Led Chaser, implemented using a 555 timer and 4017 Read More …
Cross compiling and emulating for Raspberry Pi with Debian Cross-Toolchains and QEMU
Installing the toolchain Add a .list file in /etc/apt/sources.list.d/ containing : “deb http://emdebian.org/tools/debian jessie main” Update the public key for this repo with ‘curl http://emdebian.org/tools/debian/emdebian-toolchain-archive.key | sudo apt-key add –‘ Add armhf as foreign architecture by running ‘sudo dpkg –add-architecture armhf‘. Check correct install with ‘dpkg –print-foreign-architectures‘ which should show ‘armhf‘ Run ‘sudo apt-get Read More …
How AWS VPC peering can help in blue/green deployment
You have resources you can throw away (stateless) and resources you can’t throw away (state-full). Donald Knuth said it beautifully: there is nothing you can’t solve without an extra indirection. To achieve blue/green deployment on AWS, you put all your resources that can die and revive (think auto scaling groups, malicious terminations, but also whole Read More …
The unexplainable case of the otherwise terrific Bose Quiet Comfort 35
In a previous post I talked about the pairing issues on an Ubuntu machine with a vanilla (otherwise decent) Bluetooth USB adapter. Further down the road, doing nothing really special than using the QC35 on my smartphone, laptop and (Ubuntu) desktop at home, it seemed to work for, well since my last post about it. Read More …
Let’s encrypt has become easier – avoid re-validation by rolling over within 60 days and avoid web server acme certificate protocol permission issues
The latest certbot-auto tool comes with a new feature (or I must have missed it 3 months ago) that spawns up a temporary web server on port 443. This is a huge improvement IMHO as it avoids the permissions hassle you can have on a security-hardened web server installation (be it Apache, IIS, Nginx, …). The Read More …
Bluetooth pairing issues on Ubuntu and how to fix
I recently bought a cheap but working Bluetooth usb dongle (Konig CSBLUEKEY200) for a refurbished desktop running Ubuntu 16.04. Connecting to my Nexus 6 Android phone worked seamlessly, so confident about it I hurried to connect my Bose Quietcomfort 35 headphone. I initially got it detected but pairing was a no go, whatever I Read More …