Assumptions:

This was tested on a basic standard installation of Ubuntu 18.04.  Not even updated.  Deployment below is based on a fully updated OS available (as of January 2019).  The instillation procedure below starts at the point where the OS has been installed, but nothing updated.

Copy/Paste the commands in BOLD.  

Submit them one at a time, waiting for each action to complete.  
If you already have Database, Apache and PHP installed, you can skip down to the install Vtiger setup, however additional or modified installation requirements for your system may need to be researched by you for a successful install. 

UPDATE BOX

sudo apt update

sudo apt upgrade

INSTALL APACHE

sudo apt install apache2

sudo systemctl status apache2

UPDATE FIREWALL RULES

sudo ufw allow 80/tcp

 sudo ufw allow 443/tcp

 sudo ufw reload

INSTALL SQL

sudo apt install mariadb-server mariadb-client

sudo systemctl status mysql

sudo mysql_secure_installation

SQL base Configuration
(press enter if asked for root/current password)
Set a SQL root password of your choice
say Y yes to subsequent configuration questions MariaDB install asks

INSTALL PHP

sudo apt install php php-common php-mysql php-gd php-cli

Instal PHPmyADMIN (if using vtiger chances are you’ll want to look at the SQL tables with browser)

sudo apt install phpmyadmin

System will prompt for which web server you are asking, select “APACHE”
System will ask to configure phpmyadmin with “dbconfig-common” (select YES”)
select the root password for the MYSQL instance

sudo cp /etc/phpmyadmin/apache.conf /etc/apache2/conf-available/phpmyadmin.conf 

sudo a2enconf phpmyadmin

sudo systemctl restart apache2

sudo mysql -u root -p

(mysql password)

UPDATE USER FOR PHPmyADMIN (please update password below to your liking)

CREATE USER ‘admin’@’localhost’ IDENTIFIED BY ‘PICKpassWORD‘;

GRANT ALL PRIVILEGES ON *.* TO ‘admin’@’localhost’ WITH GRANT OPTION;

FLUSH PRIVILEGES;

sudo systemctl restart apache2

http://IPofSERver/phpmyadmin

login using admin and the password you set in “PICKpassWORD” above.

VTIGER install 7.1.0

cd /tmp

wget https://sourceforge.net/projects/vtigercrm/files/vtiger%20CRM%207.1.0/Core%20Product/vtigercrm7.1.0.tar.gz

tar -xzvf vtigercrm7.1.0.tar.gz

sudo mv vtigercrm /var/www/html/

chown -R root:root /var/www/html

This fix up the php to adjust for requirements of vTIGER

sudo sed -i -r ‘s/display_errors = Off/display_errors = On/’ /etc/php/7.2/apache2/php.ini

sudo sed -i -r ‘s/log_errors = On/log_errors = Off/’ /etc/php/7.2/apache2/php.ini

sudo sed -i -r ‘s/memory_limit = 128M/memory_limit = 256M/’ /etc/php/7.2/apache2/php.ini

sudo sed -i -r ‘s/max_execution_time = 30/max_execution_time = 0/’ /etc/php/7.2/apache2/php.ini

sudo sed -i -r ‘s/short_open_tag = On/short_open_tag = Off/’ /etc/php/7.2/apache2/php.ini

Now we update the database for the VTIGER install

sudo mysql -u root -p

(enter password)

CREATE DATABASE vtiger710;

CREATE USER ‘vtiger_admin’@’localhost’ IDENTIFIED BY ‘PaSsw0rd’;

GRANT ALL PRIVILEGES ON `vtiger710`.* TO ‘vtiger_admin’@’localhost’;

FLUSH PRIVILEGES;

ALTER DATABASE vtiger710 CHARACTER SET utf8 COLLATE utf8_general_ci;

EXIT

sudo chown -R www-data:www-data /var/www/html/vtigercrm/

sudo chmod -R 755 /var/www/html/vtigercrm/

http://IPofSErver/vtigercrm

You should be presented with the Vtiger setup screen like this one