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Getting Started

Do yourself a favor and login as root to save yourself some time and headaches:

$ sudo su -

Install unattended-upgrades:

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FROM alpine:3.3
MAINTAINER Tom Maiaroto <[email protected]>

# Install packages
RUN apk --update --repository http://dl-3.alpinelinux.org/alpine/edge/main add \
    freetype-dev \
    libjpeg-turbo-dev \
    libpng-dev \
    libwebp-dev \
	php7 \

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Install and configure Sendmail on Ubuntu

This should help you get Sendmail installed with basic configuration on Ubuntu.

1. If sendmail isn't installed, install it: sudo apt-get install sendmail
2. Configure /etc/hosts file: nano /etc/hosts
3. Make sure the line looks like this: 127.0.0.1 localhost yourhostname
4. Run Sendmail's config and answer 'Y' to everything: sudo sendmailconfig
5. Restart apache sudo service apache2 restart

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After automatically updating Postgres to 10.0 via Homebrew, the pg_ctl start command didn't work.
The error was "The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 10.0."

Database files have to be updated before starting the server, here are the steps that had to be followed:

# need to have both 9.6.x and latest 10.0 installed, and keep 10.0 as default
brew unlink postgresql
brew install [email protected]
brew unlink [email protected]
brew link postgresql

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# Redis Cheatsheet
# All the commands you need to know


redis-server /path/redis.conf  # start redis with the related configuration file
redis-cli                      # opens a redis prompt


# Strings.

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Dashboard with a Raspberry Pi

Run Raspberry 3 in digital signage mode with Chromium Web browser on a TV screen

Pre-work

Download Raspbian Jessie Lite

Follow installation instructions

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#!/usr/bin/ruby
# Create display override file to force Mac OS X to use RGB mode for Display
# see http://embdev.net/topic/284710

require 'base64'

data=`ioreg -l -d0 -w 0 -r -c AppleDisplay`

edids=data.scan(/IODisplayEDID.*?<([a-z0-9]+)>/i).flatten
vendorids=data.scan(/DisplayVendorID.*?([0-9]+)/i).flatten

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#!/usr/bin/env python3
"""
To use:
1. install/set-up the google cloud api and dependencies listed on https://github.com/GoogleCloudPlatform/python-docs-samples/tree/master/texttospeech/cloud-client
2. install pandoc and pypandoc, also tqdm
3. create and download a service_account.json ("Service account key") from https://console.cloud.google.com/apis/credentials
4. run GOOGLE_APPLICATION_CREDENTIALS=service_account.json python make_audiobook.py book_name.epub
"""
import re
import sys

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# The code given in #2 gist is not in R. There is a change in formula compared to the one in this blog post and the one used by Evan Miller's tool (#3). http://www.alfredo.motta.name/ab-testing-from-scratch/#easy-footnote-bottom-24-982
#1. https://stats.stackexchange.com/questions/357336/create-an-a-b-sample-size-calculator-using-evan-millers-post
#2. https://gist.github.com/mottalrd/7ddfd45d14bc7433dec2#file-gistfile1-txt
#3. https://www.evanmiller.org/ab-testing/sample-size.html

p = 0.03
pct_mde = 0.1
alpha = 0.05
power = 1- 0.2

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