This article shows how to quickly install Docker on Ubuntu 16.04 LTS with remote TLS access. I originally created the steps while creating remote Docker instances for use with Plesk Onyx.
This article shows how to install the Microsoft SQL Server PHP extensions in Plesk Onyx (PHP 7 and 7.1 only). It was adapted from the Microsoft Drivers for PHP for SQL Server GitHub page.
You get a WordPress error that says, "HTTP Loopback Connections Disabled."
It took me awhile to figure this one out. I was getting it on a BuddyPress install (and other have reported seeing it with BackupBuddy, among others).
Most of the web sites had pointless or ineffective solutions. Some said to add define('ALTERNATE_WP_CRON', true); to wp-config.php, which was completely irrelevant, uneffective and annoying.
This is what worked for me.