Author Archives: George Valentin Voina

Failed technology: The ATM that is shutting down

By | February 25, 2017

I tried to pay some bills at my bank ATM and this was the message that was displayed on the ATM: Hard to pay the bills when the ATM is shutting down 🙂 And yes is a Windows XP, the best Windows up to date 🙂 Banks know their safe technology. [paypal_donation_button]

Blog Links: SHA-1 cryptographic hash collision detection by Google

By | March 19, 2022

Google puts another nail in the coffin for SHA-1. They already moved from using SHA-1 on their products but there are still a lot of places where is used by default. In a post on the Google Online Security Blog Announcing the first SHA1 collision Google researchers claim that they have a good way of… Read More »

#DRBD: Creating an ext4 over LVM then mount results in detach on RHEL 7 on VMWare

By | March 7, 2017

There is an interesting case of failing technology due to an unimplemented feature. See the following mail list thread for the original post. Basically if you deploy DRBD and one of the endpoints is a vmware virtual machine: – when trying to mount a newly created etx4 file-system over the LVM from the drbd device… Read More »

Blog Links: EPRS Report – How blockchain technology could change our lives

By | February 23, 2017

The EPRS (European Parliamentary Research Service) prepared an in-depth analysis of blockchain and published an interesting report. Take a look at the pdf: How blockchain technology could change our lives [paypal_donation_button]

Blog Links: Card payments and banking made easy

By | February 17, 2017

This is an interesting API to process card payments from your web or Android applications BlueSnap API. I really like when gems like this start to be available. You can spin up your card processing side of the business in minutes. Another interesting german start-up is the The Open Bank Project. Their open source API… Read More »

Blog Links: Building a vSphere 6.5 Home Lab

By | February 17, 2017

This is the kind of tutorials I like to distribute. Building a vSphere 6.5 Home Lab The above is a very well written tutorial on how to deploy VSphere on a home lab system. In the tutorial they use an Intel NUC but a HP Microserver GEN8 is even better. Take a look and have… Read More »

Docker in the datacenter with DDC

By | March 3, 2017

Docker starts to look like a competitor to virtualization environments like VMWare VSphere deplyments. In the following knowledge base article Docker Reference Architecture: Docker Datacenter Best Practices and Design Considerations there is a very interesting presentation on how to migrate a datacenter to docker. Docker Datacenter (DDC) is the enterprise container platform from Docker to… Read More »

Blog Links: Block-chain news: The truth about blockchain, healthcare uses and implementation mistakes

By | February 14, 2017

Another article in the main press (Harvard Business Review) about block-chain. The Truth About Blockchain. A real case presentation about the use case of block-chain technology in healthcare Distributed health 2016 – WarrenBrandeis Finally a nice list of main mistakes that are done when implementing in the real world block-chain technology Top 10 Mistakes in… Read More »

BlockChain: Georgia first government to use blockchain for property rights registry

By | February 10, 2017

After much hype finally there is a government that implements something with blockchain technology. Georgia together with blockchain company Bitfury, as stated on Bitfury web site: The Republic of Georgia has partnered with The Bitfury Group to advance transparency by developing a system for registering land titles using the Blockchain for the National Agency of… Read More »

Linux: Command line video editing

By | May 12, 2019

The best way to do simple video in Linux is using the command line. This way you can do quick one liner commands that do the job fast and clean. My favourite tool is ffmpeg. Install ffmpeg: If you do not have it already installed to install ffmpeg simply do (in Fedora): Install the rpmfusion… Read More »