vitali2y

Install clean Ubuntu Server 25.04 from official Ubuntu sources on the OrangePi RV2

Introduction

I got a Orange Pi RV2 recently, and it only was supplied with a pre-build Ubuntu Server image from a Chinese website. I did not like that too much. It also used Chinese mirrors, and I prefer to have full control over my install. This guide shows you how to build / install Ubuntu Server 25.04 from the official RISCV Ubuntu install media and the provided kernel sources for the RV2.

Approach

• Build kernel .deb files (using a Ubuntu 22.04 x86 VM)
• Install Ubuntu 25.04 RISCV using a RISCV VM and a NVME drive that we will use with the RV2.
• Install kernel deb files, manage the DTB properly, configure some needed stuff

vitali2y

REST API Cheat Sheet

REST Architectural Principles

• Client-Server Architecture

  • Strict separation of concerns
  • Independent evolution of components

• Statelessness

• Complete context in requests

vitali2y

log2tsv.rs: aichat + llama-cpp + gemma-3n-E4B-it-GGUF

First terminal:

✗ grep -B 10 -A 3 gemma-3n ~/.config/aichat/config.yaml
  - type: openai-compatible
    name: local
    api_base: http://localhost:8000/v1
    api_key: ""
    # default_provider: local

vitali2y

[    0.000000] Linux version 6.6.63-ky (root@test) (riscv64-unknown-linux-gnu-gcc (g09b62c20e09) 13.2.1 20240423, GNU ld (GNU Binutils) 2.42) #1.0.0 SMP PREEMPT Wed Mar 12 09:04:00 CST 2025
[    0.000000] Machine model: ky x1 orangepi-rv2 board
[    0.000000] SBI specification v1.0 detected
[    0.000000] SBI implementation ID=0x1 Version=0x10003
[    0.000000] SBI IPI extension detected
[    0.000000] SBI RFENCE extension detected
[    0.000000] earlycon: sbi0 at I/O port 0x0 (options '')
[    0.000000] printk: bootconsole [sbi0] enabled
[    0.000000] efi: UEFI not found.

vitali2y

➜  nmap -sn 192.168.1.1-254/24 | egrep "scan report" | awk '{print $5}'
OpenWrt.lan
vernee_m6.lan
greenway.lan
192.168.1.147
➜

vitali2y

Open FB video (for example walking on the water), then:

1. open DevTools (F12), then Network tab, watch for calling two GET URLs one-by-one, each with .mp4 inside: first is video without audio, second is just audio (both you can Open in New Tab) - so do Copy As cURL for both, and execute them as below (assuming 1.mp4 and 1.mp3 for both video and audio correspondently):

   IMPORTANT: it's required to remove 2 HTML params from the end of URLs: &bytestart=XXX&byteend=YYY!

   curl --output 1.mp4 https://scontent.xx.fbcdn.net/o1/v/t2/f2/m69/AQO...Kq9.mp4\?strext\=1\&_nc_cat\=108\&_nc_sid\=...&oe\=679C6293
   curl --output 1.mp3 https://scontent.xx.fbcdn.net/o1/v/t2/f2/m69/AQP...HqV.mp4\?strext\=1\&_nc_cat\=1\&_nc_sid\=&oe\=679C8E9F
   

2. merging downloaded 1.mp4 video and 1.mp3 audio into the final output.mp4 as below:

vitali2y

Below is a one liner example how to remove both <ins ... ></ins> and <script> ... </script> tags:

✗ ls *.html | xargs sed -i.bak -E '/<ins\b[^>]*>.*?<\/ins>/d; /<script\b[^>]*>.*?<\/script>/d'
✗ rg -in adsbygoogle * | more
✗ find . -type f -iname \*.html.bak -delete
✗

vitali2y

mpv https://online.nasheradio.ua/NasheRadio  # Наше Радио
mpv https://online.hitfm.ua/HitFM  # Хіт FM
mpv https://radio.ukr.radio/ur1-mp3  # UA: Українське радіо
mpv https://online.kissfm.ua/KissFM  # Kiss FM
mpv https://icecastdc.luxnet.ua/lux  # Lux FM
mpv http://91.218.212.84:8000/radionv.mp3  # Radio NV
mpv https://cast.mediaonline.net.ua/radiopyatnica320  # Радио Пятница
mpv https://online.melodiafm.ua/MelodiaFM  # Мелодия FM
mpv https://online.radiorelax.ua/RadioRelax  # Радио Relax

vitali2y

javascript:(function(){try{navigator.clipboard.readText().then(function(clipboardText){if(clipboardText){var newWindow=window.open("","_blank","width=800,height=600");newWindow.document.open();newWindow.document.write(clipboardText);newWindow.document.close();}else{alert('Clipboard is empty. Please copy some text to the clipboard first.');}}).catch(function(err){console.error('Failed to read clipboard contents: ',err);alert('An error occurred while trying to access the clipboard. Please ensure your browser allows clipboard access.');});}catch(e){console.error('An error occurred:',e);alert('An error occurred while trying to open the new window with the clipboard content.');}})();

vitali2y

1. Menu -> Display app -> Settings tab -> Enable Fractional Scaling Controls -> Layout tab -> User Interface Scale %%
2. Menu -> Accessibility app -> Visual tab -> Large Text (be aware, it resets option below)
3. Menu -> Font Selection app -> Font Settings -> Text Scaling Factor -> 1,2

Ref: Enable Fractional Scaling in Linux Mint