Tested on a standard deployment of CENTOS 7 minimal build 1810 (in HyperV environment)
Assumptions:

Deployment of CENTOS 7 minimal build 1810 has been completed with root access to your server via SSH session.  
Deployment below is based on a fully updated OS available (as of January 2019)

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

yum -y update

INSTALL MARIADB (aka MySQL)

rpm –import /etc/pki/rpm-gpg/RPM-GPG-KEY*

yum -y install epel-release

yum -y install mariadb-server mariadb

systemctl start mariadb.service

systemctl enable mariadb.service

mysql_secure_installation

        “enter for none”
SET ROOT PASSWORD = Y
Remove anonymous users= Y
Disallow root login remotely = Y
Remove test database and access to it? = Y
Reload privilege tables now = Y

INSTALL APACHE

yum -y install httpd

systemctl start httpd.service

systemctl enable httpd.service

rpm -Uvh http://rpms.remirepo.net/enterprise/remi-release-7.rpm

yum -y install yum-utils

INSTALL PHP

yum -y install php

systemctl restart httpd.service

yum -y install php-gd php-ldap php-odbc php-pear php-xml php-xmlrpc php-mbstring php-soap curl curl-devel php-imap php-mysqlnd php-pdo

systemctl restart httpd.service

 Install PHPmyadmin (handy if editing SQL data in vtiger)

yum -y install phpMyAdmin

Edit the file

/etc/httpd/conf.d/phpMyAdmin.conf

FIND THIS 

Edit the file

Change “Cookie” to “HTTP”

systemctl restart  httpd.service

Add entries into firewall

firewall-cmd –permanent –zone=public –add-service=http

firewall-cmd –permanent –zone=public –add-service=https

firewall-cmd –reload

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

mv vtigercrm /var/www/html/

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

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

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

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

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

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

sed -i -r ‘s/SELINUX=enforcing/SELINUX=disabled/’ /etc/selinux/config

mysql -u root -p

Enter in MYSQL 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

(reboot server and test!)
shutdown -r now

server reboots….

from a webbrowser on another networked computer:

http://IPaddress/vtigercrm

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

Hostname = localhost

username = vtiger_admin

password = PaSsw0rd

database name = vtiger710

Select “CREATE NEW DATABASE“

put in your MariaDB user/password (root/Password)

Pick the currency of your country

Vtiger admin userUser name – defaults to admin
password = password of your choice

First Name is optional

Last Name = Administrator

email = your email address for admin messages.

Select time zone

Press NEXT

Assuming you have everything configured properly you’ll be presented with a summary screen of config settings.

Press NEXT

Select your type of company.
This is strictly for anonymous info for vtiger.

Click on NEXT