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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.

For more about AWS and AWS Certifications and updates to this Gist you should follow me @leonardofed

Caching

Q. Memcached vs. Redis? A. https://stackoverflow.com/a/11257333

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

WordPress Emails

This document lists all the situations where WordPress sends an email, along with how to filter or disable each email.

This is accurate as of WordPress 4.9.

There are a few TODOs left. Please bear with me.

Comments
Change of Admin Email

	##
	# You should look at the following URL's in order to grasp a solid understanding
	# of Nginx configuration files in order to fully unleash the power of Nginx.
	# http://wiki.nginx.org/Pitfalls
	# http://wiki.nginx.org/QuickStart
	# http://wiki.nginx.org/Configuration
	#
	# Generally, you will want to move this file somewhere, and start with a clean
	# file but keep this around for reference. Or just disable in sites-enabled.
	#

	#add 'node_modules' to .gitignore file

	git rm -r --cached node_modules
	git commit -m 'Remove the now ignored directory node_modules'
	git push origin master

	<?php
	/**
	* Make sure the function does not exist before defining it
	*/
	if( ! function_exists( 'remove_class_filter' ) ){

	/**
	* Remove Class Filter Without Access to Class Object
	*
	* In order to use the core WordPress remove_filter() on a filter added with the callback