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class atom(object):
    """An implementation of the atom concept, inspired by Erlang.
    
    Modified from here: http://www.me.net.nz/blog/atoms-slash-symbols-in-python/
    
    """
    def __init__(self, a):
        self._a = intern(a)
    
    def __eq__(self, other):

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"""
From the man page for ssh:

     -f      Requests ssh to go to background just before command execution.  This is useful if ssh is going to ask 
             for passwords or passphrases, but the user wants it in the background.  This implies -n.  The recommended way 
             to start X11 programs at a remote site is with something like ssh -f host xterm.

             If the ExitOnForwardFailure configuration option is set to “yes”, then a client started with -f will wait 
             for all remote port forwards to be successfully established before placing itself in the background.

pertsevds

Set default branch name for new repositories to "main"

git version 2.28+

$ git config --global init.defaultBranch main

git version 2.27 or less

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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

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#
#       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

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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

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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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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

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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";

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# /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"