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Create your own Ethereum private network

Introduction

Used nodes:

Linux raspberrypi 4.9.41-v7+ #1023 SMP Tue Aug 8 16:00:15 BST 2017 armv7l GNU/Linux

Linux localhost.localdomain 4.14.5-200.fc26.x86_64 #1 SMP Mon Dec 11 16:29:08 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

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git branch -m old_branch new_branch         # Rename branch locally    
git push origin :old_branch                 # Delete the old branch    
git push --set-upstream origin new_branch   # Push the new branch, set local branch to track the new remote

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<?
/////////////////////
// slack2html
// by @levelsio
/////////////////////
//
/////////////////////
// WHAT DOES THIS DO?
/////////////////////
//

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#!/bin/bash

case "${1:-''}" in
    'start')
        if test -f /tmp/selenium.pid
        then
            echo "Selenium is already running."
        else
            export DISPLAY=localhost:99.0
            java -Dwebdriver.gecko.driver="/usr/lib/geckodriver/geckodriver" -jar /usr/lib/selenium/selenium-server-standalone.jar -port 4444 > /var/log/selenium/output.log 2> /var/log/selenium/error.log & echo $! > /tmp/selenium.pid

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/* USAGE:
 *  Sheet -> Tools -> Script Editor...
 *  Paste this script
 *  Update the map (below) to your preferences
 *  Create a button in your Sheet and Assign Script: `test`
 *  et voila profit
 */
function test() {
  // maps currencies.tokens to sheet ranges
  getPrices({

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function performLookups() {
  convertCrypto('BTC', 'USD', 2, 3);
  convertCrypto('LTC', 'USD', 3, 3);
  convertCrypto('ETH', 'USD', 4, 3);
}

function convertCrypto(symbol, currency, row, column) {
  var url = 'https://min-api.cryptocompare.com/data/price?fsym=' + symbol + '&tsyms=' + currency;
  var response = UrlFetchApp.fetch(url);
  var json = response.getContentText();

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These commands are based on a askubuntu answer http://askubuntu.com/a/581497
To install gcc-6 (gcc-6.1.1), I had to do more stuff as shown below.
USE THOSE COMMANDS AT YOUR OWN RISK. I SHALL NOT BE RESPONSIBLE FOR ANYTHING.
ABSOLUTELY NO WARRANTY.

If you are still reading let's carry on with the code.

sudo apt-get update && \
sudo apt-get install build-essential software-properties-common -y && \
sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y && \

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#!/bin/sh
#
# This hook is placed in Bare repository and it updates Working tree whenever a PUSH
# is executed
#
# Assuming following file structure:
# .
# |-- myproject
# |-- myproject.git
# set WORKTREE=../myproject

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#
# Requirements:
#   - Ubuntu server
#   - Root password for ubuntu server

# ssh into the server from local computer

ssh root@{server_name or server_ip_address}

#Updating ubuntu base packages

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// Helps with this problem:
// http://stackoverflow.com/questions/8059914/express-js-hbs-module-register-partials-from-hbs-file

var hbs = require('hbs');
var fs = require('fs');

var partialsDir = __dirname + '/../views/partials';

var filenames = fs.readdirSync(partialsDir);