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First step: Install Android SDK

1. yaourt -S android-sdk android-sdk-platform-tools android-sdk-build-tools
   Note: Maybe you'll have problems with the lasta package: ncurses5-compat-libs. In order to avoid this problem you have to use this command: gpg --recv-keys F7E48EDB. You can find clarification here.
2. yaourt -S genymotion
   Note: You'll need install virtual-box and his modules, yaourt will make for you but you need choos between ArchLinux host modules or DKMS host modules.
3. Enter in super user mode with su - and then do echo -e "vboxdrv\nvboxnetflt\nvboxnetadp\nvboxpci" > /etc/modules-load.d/virtualbox.conf
   Note: You need do this with super user because need super user permissions and with sudo, for us at least, doesn't work.
4. sudo modprobe vboxdrv vboxnetadp vboxnetflt
   Activate for current session.
5. sudo chmod -R 777 /opt/android-sdk

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Install Android SDK on Arch Linux

1. Download Android SDK on your computer

yaourt android-sdk-platform-tools
yaourt android-udev
yaourt android-sdk

2. Create global variables on system

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System Updates

http://bookofzeus.com/harden-ubuntu/initial-setup/system-updates/

Keeping the system updated is vital before starting anything on your system. This will prevent people to use known vulnerabilities to enter in your system.

sudo apt-get update
sudo apt-get upgrade
sudo apt-get autoremove
sudo apt-get autoclean

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Typical rails setup with docker+puma+nginx+postgres

Zaid Annas

Devsinc inc. 30/08/2018

Overview

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require 'active_record'
require 'fileutils'

namespace :db do

  desc "loads database configuration in for other tasks to run"
  task :load_config do
    ActiveRecord::Base.configurations = db_conf
    ActiveRecord::Base.establish_connection db_conf
  end

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rake db:create

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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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namespace :db do
  require "sequel"
  Sequel.extension :migration
  DB = Sequel.connect(ENV['DATABASE_URL'])
  
  desc "Prints current schema version"
  task :version do    
    version = if DB.tables.include?(:schema_info)
      DB[:schema_info].first[:version]
    end || 0

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In an earlier video we took a look at Rack to build incredibly lightweight web applications with Ruby. Rack's toolkit allowed us to quickly throw to get a working application, but we did have to put a little effort into it once we wanted to build something a little more complex.

Sometimes you want a fast and simple framework for building a simple web application. Perhaps you only need to respond to a handful of routes, or you want the response time for a small part of a bigger application to be lighting fast. The Sinatra framework is made for just these moments.

Today let's take a quick look at this framework and see how quickly we can build lightweight web applications.

To get started we first need to install the Sinatra gem:

gem install sinatra

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/* Shadow 0dp */
box-shadow: none;

/* Shadow 1dp */
box-shadow: 0 1px 1px 0 rgba(0,0,0,0.14), 0 2px 1px -1px rgba(0,0,0,0.12), 0 1px 3px 0 rgba(0,0,0,0.20);

/* Shadow 2dp */
box-shadow: 0 2px 2px 0 rgba(0,0,0,0.14), 0 3px 1px -2px rgba(0,0,0,0.12), 0 1px 5px 0 rgba(0,0,0,0.20);

/* Shadow 3dp */