Below are the links to the helpful posts.
http://bernardosbagofbeans.com/2016/04/installing-sentrifugo-ubuntu-14-04-lts-trusty-tahr.html https://www.digitalocean.com/community/tutorials/how-to-install-mysql-on-ubuntu-16-04
This needs to be used when configuring from UI
username: root
password: root
Database:
username: someusername
password: somepassword
$ sudo apt-get install apache2 php7.0 libapache2-mod-php7.0
a2query -m php7.0
sudo a2enmod php7.0
sudo service apache2 restart
apt-get install php7-gd
apt-get install php7.0-mysql
Then edit your php.ini file and search for pdo_mysql you might found something like this
;extension=php_pdo_mysql.so
Change it to this
extension=pdo_mysql.so
http://stackoverflow.com/a/34772698
apt-get install php7.0-gd
https://github.com/sapplica/sentrifugo/wiki/gmail-smtp-setting
I will try this documentation in the near future