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Self-Signed Certificate with Self-Signed CA

Create file san.cnf

[ v3_req ]
subjectAltName = @alt_names

[ alt_names ]
DNS.1 = *.myserver.local
DNS.2 = myserver.local

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Nginx Proxy Manager using Docker

We need NPM to run in network host so it can make use of 127.0.0.1 when setting new hosts, otherwise it will be considered NPM container itself, not the server.

services:
  app:
    container_name: nginxproxymanager
    image: 'jc21/nginx-proxy-manager:latest'
    restart: unless-stopped

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C# init Solution with multiple projects

mkdir SomeSolution
cd SomeSolution
dotnet new sln -n SomeSolution
dotnet new console -o ConsoleApp
dotnet new winforms -o WinFormApp
dotnet sln add ConsoleApp\ConsoleApp.csproj
dotnet sln add WinFormApp\WinFormApp.csproj

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C# in VSCode

tasks.json

{
    "version": "2.0.0",
    "tasks": [
        {
            "label": "dotnet: build Release",
            "command": "dotnet",

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Python log to both file and stderr

import sys
import logging
from logging.handlers import RotatingFileHandler

stderr_handler = logging.StreamHandler(sys.stderr)
rotate_handler = RotatingFileHandler("logs/rotate.log", maxBytes=5000000, backupCount=10)

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Gitlab CE

networks:
  gitlab:
    driver: bridge

services:
  gitlab:
 container_name: gitlab

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std::print - C++ Print formatter

• To use std::print need g++-14 and compile with -std=c++23.

  sudo apt install g++-14
  sudo rm /usr/bin/g++
  sudo ln -s /usr/bin/g++-14 /usr/bin/g++

g++ -std=c++23 print_me.cpp -o print_me

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Emscripten

• Clone and install SDK
  • save $EMSDK as environment var in your .profile/.zprofile/.bashrc/zshrc to make it easier later
  • install will run for a long time

git clone --depth=1 --recurse-submodules --shallow-submodules https://github.com/emscripten-core/emsdk.git
cd emsdk
export EMSDK=$(pwd) # save in you .profile or .bashrc/.zshrc
$EMSDK/emsdk install --shallow sdk-main-64bit # this takes a long time

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Let's Encrypt Certbot

sudo apt update
sudo apt install python3 python3-venv libaugeas0
# remove if installed from package manager, use python version
# sudo apt-get remove certbot
sudo python3 -m venv /opt/certbot/
sudo /opt/certbot/bin/pip install --upgrade pip
sudo /opt/certbot/bin/pip install certbot certbot-nginx

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Termux Config

Install Termux from F-Droid.

Update and install useful packages.

pkg update
pkg upgrade
pkg install openssh
pkg install iproute2