Roman Schmitz Schm1tz1

Adding trusted root certificates to the server

Mac OS X

sudo security add-trusted-cert -d -r trustRoot -k /Library/Keychains/System.keychain ~/new-root-certificate.crt
sudo security delete-certificate -c "<name of existing certificate>"

Windows

certutil -addstore -f "ROOT" new-root-certificate.crt

Kafka Cheat Sheet

Display Topic Information

$ kafka-topics.sh --describe --zookeeper localhost:2181 --topic beacon
Topic:beacon	PartitionCount:6	ReplicationFactor:1	Configs:
	Topic: beacon	Partition: 0	Leader: 1	Replicas: 1	Isr: 1
	Topic: beacon	Partition: 1	Leader: 1	Replicas: 1	Isr: 1

Installing Kubernetes on Proxox

For this example i shall be using a dedicated server from Hertzner.https://www.hetzner.de/en/. A shout out to hetzner if your looking for cheap and beefy dedicated hosting then these guys are your best bet.

Setting up the Hertzer server

This guide assumes your server has Debian 8 (Jessie installed)

Config when tested

This is a set of instructions for use with the blog article Streaming data from Oracle using Oracle GoldenGate and Kafka Connect.

@rmoff / September 15, 2016

First up, download the BigDataLite VM, unpack it and import it to VirtualBox. You'll need internet access from the VM for the downloads, so make sure you include a NAT network adaptor, or bridged onto a network with internet access. Login to the machine as oracle/welcome1. All the work done in this article is from the command line, so you can either work in Terminal, or you can run ip a to determine the IP address of the VM and then SSH into it from your host machine.

Install Confluent Platform

Use curl to get the JSON response for the latest release
Use grep to find the line containing file URL
Use cut and tr to extract the URL
Use wget to download it

curl -s https://api.github.com/repos/jgm/pandoc/releases/latest \
| grep "browser_download_url.*deb" \
| cut -d : -f 2,3 \
| tr -d \" \

Transfer a gist to a GitHub repository

clone the gist

git clone https://gist.github.com/ishu3101/6fb35afd237e42ef25f9

rename the directory

mv 6fb35afd237e42ef25f9 ConvertTo-Markdown

change the working directory to the newly renamed directory

cd ConvertTo-Markdown

Mac Uninstall pkg Manually

using pkgutil

# list all your installed packages
pkgutil --pkgs

# show your package info
pkgutil --pkg-info

	# Generate a new key
	openssl genrsa -out server.key 2048

	# Generate a new CSR
	openssl req -sha256 -new -key server.key -out server.csr

	# Check certificate against CA
	openssl verify -verbose -CApath ./CA/ -CAfile ./CA/cacert.pem cert.pem

	# Self Signed

	#!/usr/bin/perl
	# windytan's pea whistle encoder
	# http://www.windytan.com/2015/10/pea-whistle-steganography.html
	# (c) 2015 Oona Räisänen
	# ISC license

	use warnings;
	use strict;

	my $data = $ARGV[0] // "OHAI!";

	// sample code written to showcase how to use Mockito to mock certain methods to test logic in Singleton classes

	public class MySingletonClass {
	// not lazy initiated object.
	private static final MySingeltonClass INSTANCE = new MySingletonClass();

	// can be used by unit test by Mocking it. Mockito invokes this default constructor.
	@VisibleForTesting
	MySingletonClass {