Emir Özbir WoodProgrammer

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

NOTE: This is a question I found on StackOverflow which I’ve archived here, because the answer is so effing phenomenal.

Q: How can I make a chain of function decorators in Python?

If you are not into long explanations, see [Paolo Bergantino’s answer][2].

#Open vSwitch Lab

Get started with Open vSwitch, flows and OpenFlow controllers.

##Pre-reqs

Linux system with OVS installed.

##Setup

I've been playing with jq, and I've been having a hard time finding examples of how it works with output from a service like AWS (which I use a lot).

Here is one I use a lot with vagrant-ec2.

When we're launching and killing a lot of instances, the AWS API is the only way to track down which instances are live, ready, dead, etc.

To find instances that are tagged with e.g. {"Key" = "Name", "Value" = "Web-00'} in the middle of a vagrant dev cycle, or a prod launch/replace cycle, you can do something like this:

Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

Revert the full commit

Sometimes you may want to undo a whole commit with all changes. Instead of going through all the changes manually, you can simply tell git to revert a commit, which does not even have to be the last one. Reverting a commit means to create a new commit that undoes all changes that were made in the bad commit. Just like above, the bad commit remains there, but it no longer affects the the current master and any future commits on top of it.

git revert {commit_id}

About History Rewriting

Delete the last commit

Deleting the last commit is the easiest case. Let's say we have a remote origin with branch master that currently points to commit dd61ab32. We want to remove the top commit. Translated to git terminology, we want to force the master branch of the origin remote repository to the parent of dd61ab32:

	# Copyright 2017 Dan Krause
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,

	#!/usr/bin/env python
	#Reddit XSS
	#Author: Cheetz
	import urllib2, sys
	import logging, os, re, sys, urllib, string
	from optparse import OptionParser
	from urlparse import urlparse

	class Lookup:
	def run(self,url):

	#!/bin/bash

	USAGE="Attach to Docker Container
	--------------------------
	Attach to Docker Container even if the container does not run
	ssh daemon. This is accomplished by using linux containers
	directly via 'nsenter' (see http://bit.ly/docker_nsenter).
	To install 'nsenter', just execute:

	$ docker run -v /usr/local/bin:/target jpetazzo/nsenter

	import org.csanchez.jenkins.plugins.kubernetes.*
	import jenkins.model.*

	def j = Jenkins.getInstance()

	def k = new KubernetesCloud(
	'jenkins-test',
	null,
	'https://130.211.146.130',
	'default',