vitali2y / remove_html_tags_sed.md

Created January 22, 2025 09:25

Remove HTML Tags Sed

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 / save-fb-video-in-two-steps.md

Created January 26, 2025 22:43

Save FB Video In Two Steps

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

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

vitali2y / scan-local-network.md

Created February 10, 2025 09:38

Scan all IPs connected to home network

➜  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 / orange-pi-rv2-dmesg.md

Created May 2, 2025 20:53

dmesg output of Orange Pi RV2 SBC (Ubuntu Orangepirv2_1.0.0_ubuntu_noble_desktop_gnome_linux6.6.63.7z image from orangepi.org burned on SD Card)

[    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 / log2tsv-aichat-llama-local-gemma-3n-e4b-gguf.md

Created July 9, 2025 19:47

Example of aichat + llama-cpp integration with using local gemma-3n-E4B-it-GGUF model

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 / rest-api-cheatsheet.md

Created July 19, 2025 17:29

REST API Cheat Sheet

REST Architectural Principles

Client-Server Architecture
- Strict separation of concerns
- Independent evolution of components
Statelessness
Complete context in requests

vitali2y / orange pi rv2 ubuntu 25.04 clean install instructions.md

Created August 3, 2025 20:46 — forked from peterdk/orange pi rv2 ubuntu 25.04 clean install instructions.md

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