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apt-get -y install software-properties-common 
apt-add-repository ppa:brightbox/ruby-ng 
sudo apt-get update
apt-get install -y ruby2.1 ruby2.1-dev libruby2.1
gem install fluent-plugin-postgres

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Useful Vagrant commands

vagrant up
vagrant ssh
vagrant reload
vagrant halt
vagrant destroy # Just for destroying the image
vagrant port    # Shows a list of the ports forwarded from the guest to the host machine

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# Use an official Python runtime as a base image
FROM python:2.7-slim

# Set the working directory to /app
WORKDIR /app

# Copy the current directory contents into the container at /app
ADD . /app

# Install any needed packages specified in requirements.txt

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// Load the http module to create an http server.
var http = require('http');

// Configure our HTTP server to respond with Hello World to all requests.
var server = http.createServer(function (request, response) {
  response.writeHead(200, {"Content-Type": "text/plain"});
  response.end("Hello World\n");
});

// Listen on port 8000, IP defaults to 127.0.0.1

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echo "*** Installing nginx packages... ***"
apt-get install -y nginx-core
mkdir /var/www/
echo "*** Setting stuff up... ***"
STATIC_NGINX_CONF="/etc/nginx/conf.d/static.conf"
echo "<h1>This is a static content server with nginx</h1>" >> /var/www/index.html
echo "server {" > $STATIC_NGINX_CONF
echo "  listen 80;" >> $STATIC_NGINX_CONF
echo "  location / {" >> $STATIC_NGINX_CONF
echo "    root /var/www/;"  >> $STATIC_NGINX_CONF

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- name: pull an image
  docker_image:
    name: pacur/centos-7

- name: Tag and push to docker hub
  docker_image:
    name: pacur/centos-7
    repository: dcoppenhagan/myimage
    tag: 7.0
    push: yes

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apt-get update
apt-get install -y w3m vim docker nmap ngrep tmux

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Useful Docker commands

docker build -t friendlyname .                                       # Create image using this directory's Dockerfile
docker run -p 4000:80 friendlyname                                   # Run "friendlyname" mapping port 4000 to 80
docker run -d -p 4000:80 friendlyname                                # Same thing, but in detached mode
docker run -d -p 4000:80 -n containername friendlyname               # With the container name
docker run -dit --name apache2 apache2                               # Run in the background
docker ps                                                            # See a list of all running containers
docker stop <hash>                                                   # Gracefully stop the specified container

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vagrant up
vagrant ssh
vagrant reload
vagrant halt
vagrant destroy # Never ever...

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proxy_cache_path  /var/cache/nginx/sidebar levels=1:2 keys_zone=SIDEBAR:10m inactive=24h  max_size=1g;

upstream sidebar {  
    ip_hash;

    server xxx.xxx.xx.xxx:80;
    server yyy.yyy.yy.yyy:80;
}

server {