Debian/Ubuntu users:

Step 1: sudo apt-get update && sudo apt-get upgrade -y

Step 2: sudo apt-get install apache2 php5 libapache2-mod-php5 mysql-client mysql-server php5-mysql python-mysqldb -y

Step 3: sudo pip install speedtest-cli

CentOS 7 users:

Step 1: yum install httpd mariadb-server mariadb-libs php-mysql php-cli python2-pip -y

Step 2: systemctl enable httpd mariadb && systemctl start httpd mariadb

Step 3: Follow secure install guide for MariaDB here: https://mariadb.com/kb/en/mariadb/mysql_secure_installation/

Step 1: mysql -h localhost -u root -p

CREATE DATABASE iiSpeed;  
CREATE USER 'iiSpeed'@'localhost' IDENTIFIED BY 'password'; 
GRANT ALL PRIVILEGES ON iiSpeed.* TO 'iiSpeed'@'localhost'; 
FLUSH PRIVILEGES;
USE iiSpeed;
CREATE TABLE data ( sample_date_utc bigint unsigned, ping decimal(8,3), downspeed decimal(12,6), upspeed decimal(12,6) );
QUIT;

Step 1: sudo mkdir /usr/local/sbin/iiSpeed && cp speedtest_cli.py /usr/local/sbin/iiSpeed/

Step 2: sudo chmod 775 /usr/local/sbin/iiSpeed/speedtest_cli.py

Step 3: sudo echo '*/20 * * * * root /usr/local/sbin/iiSpeed/speedtest_cli.py' > /etc/cron.d/iispeed_cron

Step 1: mysql -h localhost -u iiSpeed -p

USE iiSpeed;
SELECT * FROM data;
QUIT;

Step 1: sudo mkdir /var/www/html/iispeed && mv index.php /var/www/html/iispeed/

Step 2: Copy your MySQL password for iiSpeed user: sudo vi /var/www/html/iispeed/index.php