The IP was already used for trialing on...

Issue

Plesk web host server is sending following emails multiple times a day:

From: This email address is being protected from spambots. You need JavaScript enabled to view it.n
Subject: Cron <root@localhost> /usr/bin/kcarectl --auto-update --gradual-rollout=auto
Content: The IP 76.15.48.179 was already used for trialing on 2018-07-05

Warning: require_once(Mail.php): failed to open stream

Issue

After upgrading PHP from 5.4.16 to 5.6.36 web pages that contain PEAR mail scripts fail to load with Error 500 (Internal Server Error)

After enabling display_errors in PHP settings following errors were displayed:

Warning: require_once(Mail.php): failed to open stream: No such file or directory in /var/www/vhosts/domain.com/httpdocs/forms/contact_form.php on line 18

Fatal error: require_once(): Failed opening required 'Mail.php' (include_path='.:/opt/plesk/php/5.6/share/pear') in /var/www/vhosts/domain.com/httpdocs/forms/contact_form.php on line 18

Installing Ubiquiti UniFi Controller on CentOS Docker Container (Plesk)

This tutorial shows how I installed and setup Ubiquiti UniFi Controller on 1&1 CentOS 7 VPS web server using Docker Container.

• Login to Plesk Control Panel, open Docker, search for jacobalberty/unifi, and Run latest version.
  
• Uncheck Automatic port mapping and remap ports that are already used by other services on the server. In my case, I remapped port 8880 (to 8881) and port 8443 (to 8444).
  
  Read more: Installing Ubiquiti UniFi Controller on CentOS Docker Container (Plesk)

Remove Google Authenticator from Plesk web server via SSH

Issue

CentOS Web Server Plesk Admin Panel is protected by 2 factor authentication using Google Authenticator. After replacing/losing the phone you can no longer generate the requested verification code.