How to Scan, OCR and Share a Book Anonymously

Recently, I have encountered a very rare out-of-print book that I decided to save it for the world with modern technology. Because I don’t have a real scanner, I tested all sorts of scanner android apps that are open source. OpenNoteScanner not working on every phone, auto cropping not working properly, capture fast with postprocessing, high quality result. OpenScan no auto cropping PDF-Doc-Scan auto cropping not working with book at all docus not so good auto cropping, no retouch CleanSCAN no auto cropping OSS-DocumentScanner with functional auto cropping most of the times, has filter and postprocessing but at cost of slow capture, very high quality result It ends up OSS-DocumentScanner is the best of all. To make things easier, I customized the best gamma, contrast and filter as default, based on my lighting and book condition. ...

July 26, 2025 · 2 min · Jun

Migrating Harbor instance from Linux to WSL2

In the past, I have covered how to set up Ubuntu in WSL2 and hosting local LLMs with Harbor, now I want to migrate my Harbor instance from baremetal Linux into WSL2 so that I don’t have to set it up from scratch. First thing to do is to open firewall port netsh interface portproxy add v4tov4 listenport=33811 listenaddress=0.0.0.0 connectport=33801 connectaddress=172.xx.xxx.xxx On Linux hardware: copy Harbor files from /home/username/Harbor /home/username/.ollama On Windows hardware: connect the USB drive containing Harbor files and run ...

May 26, 2025 · 1 min · Jun

Dealing with the Enshittification of ProtonVPN's Free Plan (WireGuard+NextDNS)

This post is originally composed on 2024-11-28. I’m updating it for combining NextDNS, since I have started using a new freemium app with nasty ADs in it. ProtonVPN’s free plan doesn’t allow me to configure AD blocking DNS, especially with their official app. But with WireGuard app, this can be trivial. Thank to the original guide on reddit, the newly added part is in the end of this article. As a early adopter of Protonmail, I use their later coming VPN product as well, regularly yet lightly. Although I’m a potential customer but still not paying for any of their plan, for many reasons. ...

May 12, 2025 · 5 min · Jun

Self-hosting Local LLMs (DeepSeek-R1) Easily with Harbor (Ollama+Open-WebUI+SearXNG)

Lately, there is a need of private chatbot service as a complete alternative to OpenAI’s ChatGPT. So, I decide to implement one at home and make it accessible to everyone in my household alongside with my network printer and NAS (OpenMediaVault). In the past, I used to recommend people using Llama series for English tasks and Qwen series for Chinese tasks. There was no open-source model that’s strong enough in multilingual tasks comparing to proprietary ones (GPT/Claude). ...

January 26, 2025 · 5 min · Jun

Set up Monero Wallet Securely with Anonymity

Eventually, I found myself with enough leisure and motivation to set up a crypto wallet. For my situation, investing time and money into my skills, knowledge, and projects yields more return and safer than in finance. But in this time, I found some good VPN deals which I would like to pay with XMR. Plus it’s convenient to have some spare crypto in wallet for making donations to my favorite creators and projects, so it’s time to set things up. ...

November 30, 2024 · 7 min · Jun