sahilsk

## Install Docker

```
# install the backported kernel
$ sudo apt-get update
$ sudo apt-get install linux-image-generic-lts-raring linux-headers-generic-lts-raring

$ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9

$ sudo sh -c "echo deb https://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list"

wdullaer

# Ask for the user password
# Script only works if sudo caches the password for a few minutes
sudo true

# Install kernel extra's to enable docker aufs support
# sudo apt-get -y install linux-image-extra-$(uname -r)

# Add Docker PPA and install latest version
# sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9
# sudo sh -c "echo deb https://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list"

nhagen

var a = ["sdfdf", "http://oooooolol"],
    handleNetErr = function(e) { return e };

Promise.all(fetch('sdfdsf').catch(handleNetErr), fetch('http://invalidurl').catch(handleNetErr))
    .then(function(sdf, invalid) {
        console.log(sdf, invalid) // [Response, TypeError]
    })
    .catch(function(err) {
        console.log(err);
    })

jamiewilson

Deploying a Meteor app to Digital Ocean

Table of Contents

1. Create an SSH Key
2. Create a Digital Ocean account and droplet
3. Connect to your server with SSH
4. Create a new user and disable root access
5. Give your new user sudo privileges and add SSH keys to his/her account
6. Disable remote access to root account

EvgenyOrekhov

A simple Docker and Docker Compose install script for Ubuntu

Usage

1. sh install-docker.sh
2. log out
3. log back in

Links

craigvantonder

#!/bin/bash

# AWS CLI
apt-get install zip -y;
curl "https://s3.amazonaws.com/aws-cli/awscli-bundle.zip" -o "awscli-bundle.zip";
unzip awscli-bundle.zip;
./awscli-bundle/install -i /usr/local/aws -b /usr/local/bin/aws;
aws configure;

#AWS Access Key ID [None]: Obtained when creating user in AWS IAM

ruanbekker

My Elasticsearch cheatsheet with example usage via rest api (still a work-in-progress)

Shortlinks:

• Cluster Health
  • Index Level
  • Shard Level
• Nodes Overview
• Indices Overview
• Cluster Maintenance

marilynwaldman

Continuous deployment with Jenkins 


Connection Details 
Open Google Console 
Username 
Password 
GCP Project ID 

Continuous Deployment with Jenkins

srquinn21

Notes

While researching possible Websocket vulnerabilities, I came across the "Cross Site WebSocket Hijacking" attack as documented here:

http://www.christian-schneider.net/CrossSiteWebSocketHijacking.html
https://www.notsosecure.com/how-cross-site-websocket-hijacking-could-lead-to-full-session-compromise/

TL;DR: Websockets, by spec, do not respect the browser's Same Origin Policy enforced for CORs and XHR requests. This means that a connection made in one browser tab can be hijacked in another browser tab similar to a typical XSS attack. In order to protect our services, we need to make sure that the Origin header matches the application's server name.

I've provided a nginx.conf file below that demonstrates how to check the Origin header. In addition to this config update, you'll also want to be sure to use a session token during your websocket handshake that is verified on the server for each connection. I suggest looking into JSON Web Tokens (JWT)

jrrio

Calculate the average of Object properties

Here is our Object literal with some properties. What we need to do is calculate the average height of a set of people using JavaScript.

const data = {
  "Matt": { "height" : 176, "weight": 87 },
  "Jason": { "height" : 190, "weight": 103 },
  "Peter": { "height" : 180, "weight": 98 }
};