As an IT professional, I often work on remote consoles, especially during installations or troubleshooting. Once SSH is set up, copying and pasting text is easy. However, to gain access initially, I need to enter my public key on the remote machine. Sometimes this has to be done through a VNC console, or even a Java or Spice console window. While modern ed25519 public keys are only about 50 characters (much shorter than old RSA keys) it’s still tedious to type them in by hand. ...

The Monty Hall problem is a probability puzzle. It has no logical contradiction, but for many people the result goes against their intuition. The problem originates from the American television game show “Let’s Make a Deal”. It is named after its original host, Monty Hall. The problem is stated as: Suppose you’re on a game show, and you’re given the choice of three doors: Behind one door is a car; behind the others, nothing. You pick a door, say No. 1, and the host, who knows what’s behind the doors, opens another door, say No. 3, which has nothing. He then says to you, “Do you want to pick door No. 2?” Is it to your advantage to switch your choice? ...

I just published Fyne Authenticator: an open source TOTP soft token implementation that is written in Go and uses Zbar for QR scanning. On desktop it lives in the system tray and it uses the keyring to store the encryption password for a seamless experience. Although the application has the potential to run on many platforms it is currently only tested under Debian (based) Linux. For a Windows, Android and/or iOS release I may need your help. ...

Forms play an important role in business software. Business software typically loads data from a relational database into a form, allows users to change the data and then saves the data from the form back into the database. If you make a lot of business software you have to create and design a lot of forms. To allow you to create nice looking forms (using Bulma for instance) without having to type a lot of boilerplate code I created MintyPHP Forms. ...

Ubuntu 20.04 is EOL at the end of next month, so it’s time to reinstall all your old web servers with Debian 12. Today I’ll share a post with all the configuration that I apply on my web servers. While you could apply these with Chef, Ansible or SaltStack (like a real pro), you can also type them in, like I often do. I’m using Debian 12 netinst and configure “SSH server” and “standard system utilities” as a default packages. ...

A while ago I told you about the free email service I’m building that respects privacy and prevents profiling on 103mail.com. The reason? Microsoft and Google operate most of the world’s email services and because email messages often contain all previous content, they can profile all people in the world (even people that do not use their services). When using 103mail.com the email (content) will never leave the server. The outgoing email will be replaced with a notification with a link to the web mail viewer. Thus the outgoing mail content can only be viewed over the web and people or servers reading the mail will be logged. ...

I don’t like laptops. They are slow, have small screens and horrible keyboards and track pads. When I have to work on them for a longer period of time my back starts to ache. Next to that they often can’t be upgraded or repaired, because the storage and memory are soldered or glued onto the motherboard. And when you want to run Linux you are often disappointed by the (unsupported) exotic hardware. Nevertheless every now and then a loved one asks me to buy a laptop for them and they expect me to know which one is the best. ...

You can store PHP sessions in Memcache or Redis. High traffic websites with multiple application nodes choose either sticky sessions with file session storage (recommended) or centralized Memcache or Redis session storage. If you choose Memcache or Redis you should NOT rely on your favorite framework’s implementation (see: “A session locking test suite for PHP”). But even if you rely on native implementations in PHP extensions you may run into wrong default values. This post explains you how to configure PHP session storage in Memcache and Redis and test that it locks properly. ...

Memcache is a very fast cache that is a great addition to MariaDB and PHP. It is simpler and more performant than Redis. I prefer Redis for session storage and Memcache for application caching in my (high-performance) PHP projects. Installing Memcache is very easy (on any Debian based Linux), all you have to do is type: sudo apt install memcached In order to allow PHP to talk to Memcache you need the “php-memcache” extension. You can install that with: ...

GopherCon Europe is a well known Go conference. We are listing the GopherCon Europe 2023 and 2024 conference videos. The videos are posted on the GopherCon Europe Youtube channel and are linked below. GopherCon Europe 2024 Martin Gallauner - From Java to Go: I Have a Hammer and See Nails Everywhere (16:54) Robert Laszczak - Rethinking Domain-Driven Design in Go (28:41) Raghav Roy - Using Formal Reasoning to Build Concurrent Go Systems (29:27) Zvonimir Pavlinovic - Securing Containers Against Known Go Vulnerabilities (21:55) Felix Geisendörfer - How to Win Frames and Influence Pointers @felixge (28:02) Rabieh Fashwall - Unraveling Go Anti-Patterns (29:46) Hila Fish - Technical Documentation (29:49) Jonathan Amsterdam - HTTP Routing Enhancements (25:31) Chioma Onyekpere - Leveraging Go for Efficient Infrastructure & Data Handling (12:12) Travis Cline - Building AI Applications in Go (28:12) Go Team Panel (45:36) Go in DevOps Panel (43:09) Agniva de Sarker - A Deep Dive into the DB Connection Pool (13:00) Go Time Podcast (44:01) Diana Shevchenko - Memory Optimization through Structure Packaging (14:23) Cameron Balahan - The Business of Go (28:38) GopherCon Europe 2023 Cameron Balahan - Keynote: The State Of Go (27:51) Xe Iaso - Reaching the Unix Philosophy’s Logical Extreme with Webassembly (23:36) Robert Grandl - Towards Modern Development of Cloud Applications (26:46) Björn Rabenstein - How to Avoid Breaking Changes in your Go Modules (26:30) Yiscah Levy Silas - Go Right Ahead! Simple Hacks to Cut Memory Usage by 80& (20:59) Maciej Rzasa - API Optimization Tale: Monitor, Fix and Deploy (24:14) Julie Qiu - Vulnerability Management for Go (24:17) Jonathan Amsterdam - A Fast Structured Logging Package (25:37) Go Panel (42:37) Drishti Jain - Go Beyond the Console: Developing 2D Games in Go (29:04) Ayesha Kaleem - Gentle Introduction to EBPF (19:47) Julien Cretel - Useful Functional-Options Tricks for Better Libraries (27:07) Giuseppe Scaramuzzino - Unleashing Desktop App Development with Go and Fyne (4:45) Robert Burke - I’m Excited to Use Generics in Go 1.21 (7:02) Yolan Romailler - TLOCK: Encrypting Messages to the Future in Go (5:27) Yusef Mohamadi - Race Conditions in Details (6:38) Ron Evans - A Small Update on Tiny Go (8:36) GoTime Podcast Live (28:56) Elena Grahovac - Why Integration Tests Might be Better than Unit Tests (25:59) Mohammed Al Sahaf - The Road to CGO-Less is Paved (30:39) Roman Khavronenko - Writing a TSDB from Scratch: Performance Optimization (25:48) Yarden Laifenfeld - Go Sync or Go Home (28:43) Enjoy! ...