Kryptonite - The new way to protect your private key on your phone.
Kryptonite combines the secure key storage of a USB smart card with a familiar mobile phone interface. The Kryptonite app performs SSH signatures without revealing the private key to a paired computer. A Kryptonite SSH key can be used without modifying any servers, allowing users to secure their GitHub, AWS, and Google Cloud SSH authentication without any changes to their infrastructure. Communication with Kryptonite occurs over encrypted and signed push notifications and Bluetooth, ensuring high availability and low latency. Kryptonite also verifies and displays exactly which server is being logged in to, unlike USB solutions that do not have a user interface.
ssh  encryption 
6 days ago
unbal.eps - mca-cup-0.5.9.pdf
This is a book about algorithms for performing arithmetic, a
nd their implementation on modern computers. We are concerned with software more than hardware – we do not cover computer architecture or the design of computer hardware since good books are already available on these topics. Instead, we focus on algorithms for efficiently performing arithmetic operations such as addition, multiplication, and division, and their connections to topics such as modular arithmetic, greatest common divisors, the fast F
ourier transform (FFT), and the computation of special functions.

The algorithms that we present are mainly intended for arbit
rary-precision arithmetic. That is, they are not limited by the computer wordsize of 32 or 64 bits, only by the memory and time available for the computation. We consider both integer and real (floating-point) computations.
computer  math  programming  pdf 
21 days ago
Your one-stop static site engine

Forget dependencies. Everything you need in one binary.
programming  rust  web  blog 
4 weeks ago
Rethinking Vim as a tool for writing
Also see the other plugins by this author.
vim  writing 
4 weeks ago
The V2450 GPS Streaming Video Drone with Auto Pilot outperforms every drone in its class. Flying is simple – navigate with one finger and a single joystick or maintain a stable hover in mid-air with no hands on the controller. Then, just press a button and the built-in GPS automatically brings it home.
electronics  drone  arduino 
4 weeks ago
The Amazing $1 Microcontroller - Jay Carlson
A new series that explores 21 different microcontrollers — all less than $1 — to help familiarize you with all the major ecosystems out there.
electronics  embedded  microcontroller 
5 weeks ago
Engineering Manager Resources
A list of engineering manager resource links.
work  engineering  management  Book 
6 weeks ago
Vim Awesome
Awesome Vim plugins from across the Universe
dev  vim  plugin 
7 weeks ago
Logical Increments
Logical Increments helps you choose parts for your PC.
computer  pc  Builds 
9 weeks ago
Downloads At Kano | Computer Kits & Coding For All Ages — Kano Developers
An open-source OS for exploration, creation, and play – free for Raspberry Pi and the new Pi 3.
raspberry_pi  os  kids  education  games  programming 
10 weeks ago
What is a CAA record? - DNSimple Help
A Certification Authority Authorization (CAA) record is used to specify which certificate authorities (CAs) are allowed to issue certificates for a domain.
networking  DNS  ssl 
september 2017
Half -- Cut Energy Use and Green House Gas Emissions by Half
We used the Half Plan to cut our total energy use, energy costs, and greenhouse gas emissions in half (and then some).

We cut our energy use for electricity, space heating, water heating, and transportation from 95,000 KWH per year to 36,000 KWH per -- this is saving us $4,800 per year in energy costs, and has reduced our CO2 emissions by 18 tons.

The links below show how we did this, and how you can develop a set of projects to do the same -- or more.
home  howto  energy  savings 
september 2017
Your PasswordCard
A PasswordCard is a credit card-sized card you keep in your wallet, which lets you pick very secure passwords for all your websites, without having to remember them! You just keep them with you, and even if your wallet does get stolen, the thief will still not know your actual passwords.
august 2017
Krita | Digital Painting. Creative Freedom.
Krita is a professional FREE and open source painting program. It is made by artists that want to see affordable art tools for everyone.
graphics  opensource  software  painting  wacom 
august 2017
SOGo: Open Source Groupware
Share your calendars, address books and mails in your community with a completely free and open source solution.
server  calendar  contacts  opensource 
july 2017
The Hitchhiker’s Guide to Python! — The Hitchhiker's Guide to Python
This handcrafted guide exists to provide both novice and expert Python developers a best practice handbook to the installation, configuration, and usage of Python on a daily basis.

This guide is opinionated in a way that is almost, but not quite, entirely unlike Python’s official documentation. You won’t find a list of every Python web framework available here. Rather, you’ll find a nice concise list of highly recommended options.
Python  python3 
july 2017
Security/Guidelines/OpenSSH - MozillaWiki
The goal of this document is to help operational teams with the configuration of OpenSSH server and client. All Mozilla sites and deployment should follow the recommendations below.
howto  ssh 
june 2017
Static HTML Crypto
Password protect a static HTML page.

Based on the crypto-js library, StatiCrypt uses AES-256 to encrypt your string with your passphrase in your browser (client side).
tools  website  encryption 
june 2017
Github - m42e/ttrss_plugin-feediron

This is a plugin for Tiny Tiny RSS (tt-rss). It allows you to replace an article's contents by the contents of an element on the linked URL's page, i.e. create a "full feed".
RSS  ttrss  plugin 
june 2017
ome useful websites for programmers.

When learning CS there are some useful sites you must know to get always informed in order to do your technologies eve and learn new things. Here is a non exhaustive list of some sites you should visit, this list will get updated as soon as I can get another link, but you can also contribute by adding those you know 😉
programming  website 
june 2017
Monica - a CRM for your friends and family
You know all those birthdays you forget? And when you last called your grandmother? When you last had coffee with that ex-colleague? Who did you lend that book to again?
family  opensource  server 
june 2017
What Works, What Doesn't - What_works,_What_doesn't.pdf
Some study techniques accelerate learning, whereas
others are just a waste of time — but which ones are
which? An unprecedented review maps out the best
pathways to knowledge
study  education 
may 2017
Making reliable distributed systems in the presence of software errors
pdf  erlang  software 
may 2017
Level up your programming skills

Download and solve practice problems in over 30 different languages.

Submit the solution to the site for feedback (beta).

For code newbies and experienced programmers.
programming  learning 
may 2017
A comparison between some VPS providers
server  Linux 
may 2017
A distraction-free Markdown editor for Windows and Linux.
markdown  tools  editor 
april 2017
VHDL-tool is a VHDL syntax checking, type checking and linting tool. It is also a language server for VHDL, making IDE features such as finding definitions, references and autocompletion available within editors that support the Language Server Protocol.
vhdl  work  vim  editor  Linux  lint 
april 2017
Building a NAS
I’ve been fascinated by high-volume, fault-tolerant data storage systems for a long time. I started my data storage setup in earnest with a 4-disk RAID 5 array on an ARC-1210 controller installed in my daily-driver Windows desktop. When that array inevitably filled up, I added another array on a second ARC-1210. That slowly filled up, too, and I knew I couldn’t just keep stuffing RAID cards in my desktop; I had to build a serious file storage server eventually.

I considered many different storage options and configurations, including a large hardware-controlled RAID system on a Windows or Linux environment, a software-controlled array in a Windows-based server, a Drobo-type “keep it simple, stupid” system, and continuing to simply add more drives to my desktop computer. None of these options seemed to address all my requirements very well. I eventually stumbled upon FreeNAS, a FreeBSD-based, network storage oriented operating system that uses the ZFS file system and a web interface to configure network sharing and other settings. While most of the setup and system management is done through this web interface, but you can extend the machine’s capabilities quite a bit through the terminal via SSH. In this article, I’ll go over my hardware selections, the build and configuration process, some of the other applications I have running on the machine, and a bit of theory about how ZFS allocates array storage space and how it can be tuned to reduce allocation overhead.
NAS  server  FreeNAS 
april 2017
A Review of Modern Sail Theory (1981) [pdf] | Hacker News
Bruce Banks and Dick Kenny in their book “Looking at
Sails” (Reference 1) state that “it is essential to anyone
interested in sails, and indeed sailing, that the fundamen-
tal principles are thoroughly understood.” They then
follow with several pages of sail theory and repeat basic
ideas that have appeared in the sailing literature for many
years. Unfortunately, their explanations of the most
important aspects of sail theory (how a sail gives lift, the
interaction between the jib and main, the slot effect) are
completely wrong.
Virtually all of the sailing references contain similar, but
erroneous explanations when they discuss the aerody-
namics of sails. References 1 through 5 are typical. These
books and magazine articles were written by recognized
sailing authorities, class champions, Olympic sailors, and
famous sailmakers. How could these fundamental ideas
on sailing be wrong, and how could they persist for so
long? All of these people are certainly excellent sailors.
They have learned from practical experience what it takes
to make a boat go fast. But when they talk or write about
the aerodynamics of sails, they get into trouble.
As a research aerodynamicist, I was dumbfounded when I
first started reading the sailing literature as a beginning
sailor and saw what a confused state sail theory was in.
Even the basic explanations of how a sail generates lift
were wrong. This I could understand, since even the
popular aviation books were wrong in their attempts to
explain lift. It is difficult to explain the generation of lift for
laymen. The simplifications devised in attempts to do this
seemed logical but usually turned out to be wrong.
pdf  sailing 
march 2017
A structured VHDL design method [pdf]
Description of 2 process (one async and one sync) design methodology for VHDL.
vhdl  pdf  work 
february 2017
htop explained | peteris.rocks
For the longest time I did not know what everything meant in htop.

I thought that load average 1.0 on my two core machine means that the CPU usage is at 50%. That's not quite right. And also, why does it say 1.0?

I decided to look everything up and document it here.

They also say that the best way to learn something is to try to teach it.
performance  server  tools 
december 2016
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