ApacheBench Tool (ab)

ApacheBench tool comes bundled with the standard Apache source distribution for measuring the performance of HTTP web servers. This especially shows you how many requests per second your Apache is capable of serving by generating a flood of requests to a given URL and returns some easily digestible performance related metrics to the screen.

For example, the following command will execute 1000 HTTP GET requests, processing up to 10 requests concurrently, to the specified URL.

ab -k -n 1000 -c 10 "https://comparis.com.br/"

Ubuntu 14.04 – PHP Version Upgraded

php -v

Shows:

PHP 5.6.25-2+deb.sury.org~trusty+1 (cli)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologiescode

In the page the php code phpinfo();

phpinfo();

Shows:
PHP Version 5.5.9-1ubuntu4.19

Now to correct this you need to:

sudo a2dismod php5
sudo a2enmod php5.6
sudo service apache2 restart

Cheers

Letsencrypt Combining plugins

Combining plugins

Sometimes you may want to specify a combination of distinct authenticator and installer plugins. To do so, specify the authenticator plugin with --authenticator or -a and the installer plugin with --installer or -i.

For instance, you could create a certificate using the webroot plugin for authentication and the apache plugin for installation.

certbot run -a webroot -i apache -w /var/www/html -d example.com

Link: Get more info at Certbot.