Cuong Nguyen Duc cuong-nd

How to setup Let's Encrypt for Nginx on Ubuntu 18.04 (including IPv6, HTTP/2 and A+ SLL rating)

Virtual hosts

Let's say you want to host domains first.com and second.com.

Create folders for their files:

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

	if [ ! -f .env ]
	then
	export $(cat .env \| xargs)
	fi

	#!/bin/bash
	# By B Shea Dec2018 & Mar2020
	# https://www.holylinux.net

	# Test for OpenSSL - if not installed stop here.
	if ! [[ -x $(which openssl) ]]; then
	printf "\nOpenSSL not found or not executable.\nPlease install OpenSSL before proceeding.\n\n"
	exit 1
	fi

	#!/bin/bash
	# By B Shea Dec2018 & Mar2020
	# https://www.holylinux.net

	# Test for OpenSSL - if not installed stop here.
	if ! [[ -x $(which openssl) ]]; then
	printf "\nOpenSSL not found or not executable.\nPlease install OpenSSL before proceeding.\n\n"
	exit 1
	fi