This summer has been quite hot…So hot that I started to think how to turn off the sun for a while.. First thought would be to throw some water to the sun to cool it down. Will it work? After all, when you have a fire and you throw some water to it, it will cool down and eventually die off.. Can we do something similar with the Sun? Maybe throw a lot of water, like 10 time its mass to it? Continue reading “Throwing water to the Sun”
Spent Nuclear Fuel
In the last article I explained what happen to uranium inside the nuclear reactors (I advise that you read that first). Now i want to close this topic with an article that explain what is usually happening to the nuclear wastes when they are removed from reactor. Continue reading “Spent Nuclear Fuel”
Nuclear Reactor’s fuel
Yesterday I saw a commercial of Chernobyl HBO TV series and it inspired me to write this article on nuclear power reactors. The idea is to briefly explain the physics behind the nuclear fission and what happen to the uranium inside the reactor. So lets start. Continue reading “Nuclear Reactor’s fuel”
Hardware-based authentication: Yubikey configuration
In the last article I gave a quick overview of the hardware tokens and the yubikey. Today we will go more in details and we will see how to set and use GPG keys on the yubikey. Continue reading “Hardware-based authentication: Yubikey configuration”
Hardware-based authentication: Yubikey overview
In this article series, I am going to explain what is an hardware based authentication and how to configure one of the most famous (the yubikey) to work with your accounts and hold your ssh /gpg keys . Continue reading “Hardware-based authentication: Yubikey overview”
Setup data disks on Azure VM and Fix broken FSTAB
This is a quick guide on how to configure extra data drives to ubuntu/linux machine on azure, to get automatically mounted on startup using the shell. Also i will explain how to fix the boot process in case you mess up with the fstab file and the VM will not boot anymore. Continue reading “Setup data disks on Azure VM and Fix broken FSTAB”
MongoDB optimization
Databases are like religion. Everyone believe to withhold the ultimate best solutions… These ordered collection of data that are in the core almost all (if not all) complex systems. Even Simple website like this, have thousands of entries in a sql like database, and they never creates problems, until … one rainy day they do became slow, unresponsive, resource hungry… and that is where the pain start. Today I will give some hint on how to try to optimize a MongoDB database, by looking at its stats(). Continue reading “MongoDB optimization”
Bit Coin Wallet Collider
Ahh BitCoins! Welcome to the world of crypto currencies, where everything is decentralized and where making money is as easy as find a solution to a crypto-problem… Continue reading “Bit Coin Wallet Collider”
PC boot process – Extra: TPM with Luks / Bitlocker
In this quick article I want to extend the previous article on booting process and discuss few missing technologies that can play some role in the startup process. Those are not strictly required to your PC to work, but you may are already using them for example if you enabled encryption. Continue reading “PC boot process – Extra: TPM with Luks / Bitlocker”
PC boot process – Compatibility mode and secure boot
This is the last article of the “PC booting process” series and i want to quickly present few missing concepts that you may incur related to this topic. Again, my task is not to make you an expert, but just to give you a good understanding on what is happening when you push your “on button” on your pc. So let’s start from where we left… Continue reading “PC boot process – Compatibility mode and secure boot”