pertsevds

Some hosting providers like scaleway allows to remove the IPv4 from the VPS in order to save 1€/month but doing this will result in losing connectivity to the "IPv4 world".
Or you may have ordered a VPS that only has IPv6 connectivity and you want to access to a resource only accessible from the "IPv4 world".
Here is how to gain your access back to the "IPv4 world".

Change your name servers(s) to DNS64 name servers(s)

Note: You may deploy your own DNS64 & NAT64 server on a separate server by following this tutorial (untested): https://packetpushers.net/nat64-setup-using-tayga/.
Note²: You may find a explanation of what is NAT64 and DNS64 on Wikipedia.

1. Choose a/multiple DNS64 public server(s) that has/have its own NAT64 public service from this list:

pertsevds

Lifecycle of Supervisors and Processes

Mix.install([
  {:kino, "~> 0.6.2"}
])

This is a free sample from the Elixir Patterns book

pertsevds

Hydrate ETS from DETS using an init GenServer

Mix.install([
  {:kino, "~> 0.6.2"},
  {:telemetry, "~> 1.2.1"}
])

This is a free sample from the Elixir Patterns book

pertsevds

# /etc/udev/rules.d/99-usb-serial.rules
# udevadm info --attribute-walk -n /dev/ttyUSB0  |grep serial (can be used to get serial number)
# udevadm control --reload-rules (reload rules)
# udevadm trigger (re-add all devices)
# see https://wiki.archlinux.org/index.php/Bus_pirate
# for some reason, ATTRS{bInterfaceNumber}=="00" is not working, hence the use of ENV{}

# single USB/serial adapters
SUBSYSTEM=="tty", ATTRS{serial}=="A900TUKZ", SYMLINK+="ttyUSB_bub_1"
SUBSYSTEM=="tty", ATTRS{serial}=="A700fdWb", SYMLINK+="ttyUSB_bub_2"

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{
  description = "A nixos cloudinit base image without nixos-infect";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs";
  };

  outputs = { self, nixpkgs }:
  let
    system = "x86_64-linux";

pertsevds

f().

Str = fun(X) -> io_lib:format("~p", [X]) end.

Percent = fun
  (A, 0) -> "100%";
  (A, B) -> [Str(round(100*A/B)), "%"]
end.

Get = fun

pertsevds

Intro

This note describes how to connect two networks/devices/VMs over public network using Wireguard with Layer 2 support (ARP, IPv6 link-local, etc).

This can also be achieved using SSH and its "tap" tunnel, however, it does not provide the same level of latency and bandwidth as full-blown VPN such as Wireguard.

In addition, this note describes how to tunnel Wireguard over TCP connection. This may be of use if you encounter firewall in-between so, for instance, you can use TCP port 443 only.

Objective

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#!/usr/bin/env bash
#Install brew and qemu + cloud init metadata dependencies
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)" 
brew install qemu
brew install cdrtools

rm -rf /tmp/ubuntuqemuboot

#download Ubuntu 20.04 Cloud Image and resize to 30 Gigs
mkdir -p /tmp/ubuntuqemuboot/images

pertsevds

#
#       Usage:
#       elixir <this_script_name.exs> 1.7.2
#
#       The script grabs a Phoenix version and places it
#       under `phoenix/<version>` subfolder. It attempts to call
#       a diff GUI, if there's another version found in `phoenix`.
#       It picks the closest older version, if more than one found.
#
#       Feel free to modify PhoenixCompareConfig

pertsevds

Python installation guide

Install asdf and its python plugin, then install Python

asdf lives in https://github.com/asdf-vm/asdf

Follow its installation instructions, which at the moment of writing were:

cd