Tutorials
Step-by-step technical guides on Docker, Linux, Python, Go, and more.
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PostgreSQL: Create Database with UTF-8 Encoding [Complete Guide]
Create PostgreSQL database with UTF8 encoding. Fix template encoding errors. Guide covers locale, collation, and encoding conversion.
Failed: Module DevicePowerOn Power On Failed — VMware Fix 2026
Fix VMware "Failed: Module DevicePowerOn power on failed" error. Caused by Hyper-V conflict, VirtualBox coexistence, or corrupt VM state. Works on VMware Workstation and ESXi.
tmux cheatsheet
Terminal MUltipleXer (tmux) allows you to switch between several terminals in one. In this tmux cheat sheet, we show the most common actions and commands, like list session, new window, tmux detach.
How to execute sudo with no password
In this short tutorial, we are going to explain how to configure the /etc/sudoers file for no password sudo. TLDR; username ALL=(ALL) NOPASSWD:ALL . We will also explain how to use a group to allow execution of sudo with no password.Check our...
Moviepy: example script with subtitles
In this short tutorial, we are to explain how to use moviepy to add subtitles to a video. We use CompositeVideoClip for adding the subtitles in the center position of the video. With this script you can add subtitles as a batch process to multiple videos.
Ubiquiti UAP: Prevent WiFi Deauth Attacks
In this tutorial, we are going to explain how to enable WiFi protection to avoid getting attacked by authentication packets. The option in the unifi controller is called PMF and it enables the IEEE 802.11w-2009. You can enable this option on the WLAN...
Everything about what you should or should commit
In this tutorial, we are going to answer the question *should I commit...*. For example, should you commit .gitignore file? mix-manifest.json or what about package-lock.json? Check here the common questions about which files you should or should not...
Docker daemon.json Configuration Guide
Docker daemon.json complete configuration reference. Redirecting to updated 2026 guide.
python3 http server command line
In this short tutorial we explain how to start a simple http server from the command line, very useful to share files across the network. Just execute python -m http.server 8000
How to use postgresql jsonb type with django
Learn how to use PostgreSQL JSONB column by following this tutorial that explain how to use schemaless with django and postgresql