Zhao Xiaohong mrluanma

Running Ubuntu 21.04 on QEMU MicroVM

I mean, in this era of containers, it's not like you'd need this very often, but if you do, you do.

Download the required image files

https://cloud-images.ubuntu.com/releases/hirsute/release/unpacked/ubuntu-21.04-server-cloudimg-amd64-vmlinuz-generic https://cloud-images.ubuntu.com/releases/hirsute/release/unpacked/ubuntu-21.04-server-cloudimg-amd64-initrd-generic https://cloud-images.ubuntu.com/releases/hirsute/release/ubuntu-21.04-server-cloudimg-amd64-disk-kvm.img

Linux Desktop on Apple Silicon in Practice

I bought M1 MacBook Air. It is the fastest computer I have, and I have been a GNOME/GNU/Linux user for long time. It is obvious conclusion that I need practical Linux desktop environment on Apple Silicon.

Fortunately, Linux already works on Apple Silicon/M1. But how practical is it?

Two native ports exist.

A friend recently learned about Proebsting's law and mentioned it to me off hand. I knew about the law's existence but I never really asked myself - do I believe in it?

For people who aren't aware, Proebsting's law states:

Compiler Advances Double Computing Power Every 18 Years

Which is to say, if you upgrade your compiler every 18 years, you would expect on average your code to double in performance on the same hardware.

Let's C about this

macOS wine 32/64-bit Setup

Run 32-bit apps on macOS Catalina (10.15) and Big Sur (11.0).

Installation

Dependencies

First install homebrew brew.sh

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

Use pre-built gccemacs

Fortunatly we could use pre-built gccemacs right now.

Those two repos did the greate job for us.

https://github.com/twlz0ne/nix-gccemacs-darwin

https://github.com/twlz0ne/nix-gccemacs-sierra

Here is the tutorial:

	import chdb

	# Get total rows
	total_rows = int(chdb.query("""
	SELECT COUNT(*)
	FROM postgresql('192.168.3.135', 'sample_db', 'users', 'postgres', 'mysecretpassword')
	""").bytes().strip())

	# Calculate rows per file
	rows_per_file = -(-total_rows // 10) # Ceiling division

	# Rails production setup via SQLite3 made durable by https://litestream.io/
	# Copy this to Dockerfile on a fresh rails app. Deploy to fly.io or any other container engine.
	#
	# try locally: docker build . -t rails && docker run -p3000:3000 -it rails
	#
	# in production you might want to map /data to somewhere on the host,
	# but you don't have to!
	#
	FROM ruby:3.0.2

	# Builds NGINX from the QUIC+HTTP/3 development branch
	# - Based on the official NGINX docker image, including all modules built by default
	# - OpenSSL replaced with LibreSSL to support QUIC's TLS requirements (statically linked)
	#
	# docker build --no-cache -t nginx:quic .
	# docker run -d -p 443:443 -p 443:443/udp nginx:quic
	#
	# Note that a suitable configuration file and TLS certificates are required for testing!
	# See <https://quic.nginx.org/readme.html> for more info

	terraform {
	required_providers {
	digitalocean = {
	source = "digitalocean/digitalocean"
	}
	}
	}

	provider "digitalocean" {
	}

	# Asynchronous file open/close
	# https://nullprogram.com/blog/2020/09/04/

	import asyncio

	class _AsyncOpen():
	def __init__(self, args, kwargs):
	self._args = args
	self._kwargs = kwargs