George Masgras gmas

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

Don't use VPN services.

No, seriously, don't. You're probably reading this because you've asked what VPN service to use, and this is the answer.

Note: The content in this post does not apply to using VPN for their intended purpose; that is, as a virtual private (internal) network. It only applies to using it as a glorified proxy, which is what every third-party "VPN provider" does.

A Russian translation of this article can be found here, contributed by Timur Demin.
A Turkish translation can be found here, contributed by agyild.
There's also this article about VPN services, which is honestly better written (and has more cat pictures!) than my article.

There are three easy to make mistakes in go. I present them here in the way they are often found in the wild, not in the way that is easiest to understand.

All three of these mistakes have been made in Kubernetes code, getting past code review at least once each that I know of.

Loop variables are scoped outside the loop.

What do these lines do? Make predictions and then scroll down.

func print(pi *int) { fmt.Println(*pi) }

 # Download latest archlinux bootstrap package, see https://www.archlinux.org/download/
 wget 'ftp://ftp.nluug.nl/pub/os/Linux/distr/archlinux/iso/latest/archlinux-bootstrap-*-x86_64.tar.gz'
 # Make sure you'll have enough entropy for pacman-key later.
 apt-get install haveged
 # Install the arch bootstrap image in a tmpfs.
 mount -t tmpfs none /mnt
 cd /mnt
 tar xvf ~/archlinux-bootstrap-*-x86_64.tar.gz --strip-components=1

	from __future__ import print_function

	import json
	import boto3
	import logging

	#setup simple logging for INFO
	logger = logging.getLogger()
	logger.setLevel(logging.ERROR)

	Section "InputClass"
	Identifier "touchpad"
	Driver "synaptics"
	MatchIsTouchpad "on"
	Option "TapButton1" "1"
	Option "TapButton2" "3"
	Option "TapButton3" "2"
	Option "VertEdgeScroll" "on"
	Option "VertTwoFingerScroll" "on"
	Option "HorizEdgeScroll" "on"

	Protocol that worked to install Arch on a remote server

	Situation: host provides CentOS image but not one for Arch.
	Default CentOS install includes two hard drives in a RAID 1 setup, mapped as /dev/mapper/vg-root and /dev/mapper/vg-swap

	Guides:
	https://wiki.archlinux.org/index.php/Remote_installation
	https://wiki.archlinux.org/index.php/Install_from_existing_Linux
	https://wiki.archlinux.org/index.php/Install_from_SSH
	http://ordinatechnic.com/os-specific-guides/arch/archlinux-installing-from-an-existing-linux-installation

	#!/bin/bash
	#
	# Sample for getting temp session token from AWS STS
	#
	# aws --profile youriamuser sts get-session-token --duration 3600 \
	# --serial-number arn:aws:iam::012345678901:mfa/user --token-code 012345
	#
	# Based on : https://github.com/EvidentSecurity/MFAonCLI/blob/master/aws-temp-token.sh
	#

	require "net/http"

	def start_server
	# Remove the X to enable the parameters for tuning.
	# These are the default values as of Ruby 2.2.0.
	@child = spawn(<<-EOC.split.join(" "))
	XRUBY_GC_HEAP_FREE_SLOTS=4096
	XRUBY_GC_HEAP_INIT_SLOTS=10000
	XRUBY_GC_HEAP_GROWTH_FACTOR=1.8
	XRUBY_GC_HEAP_GROWTH_MAX_SLOTS=0

	#!/system/bin/sh

	# found at
	# http://forum.xda-developers.com/showpost.php?p=58433704&postcount=6890
	# also see
	# http://forum.xda-developers.com/showpost.php?p=58416801&postcount=6883

	for descriptor in \
	cast.media.CastMediaRouteProviderService \
	cast.media.CastRemoteDisplayProviderService \