====== Install Zabbix 4.0 Server on Ubuntu 16.04 (Xenial) LTS ======
-- //Tested with **Ubuntu 16.04 (Xenial) LTS** and **Zabbix Server 4.0 beta 1** on **September 2018**// --


==== Add Zabbix 4 Repository =====

Add Zabbix 4 repository (beta is version still numbered as 3.5)
  echo "deb http://repo.zabbix.com/zabbix/3.5/ubuntu xenial main" | sudo tee /etc/apt/sources.list.d/zabbix4.list > /dev/null

Add the missing public key for repository with
  sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 082AB56BA14FE591
 
and update the apt package list with
  sudo apt-get update

==== Install Zabbix 4 Server =====

Install the Zabbix server (if //mysql// has not been installed before, please note down the //root// password!)
  apt-get install mysql-server zabbix-server-mysql zabbix-release

Secure your Mysql/MariaDB installation with
  sudo mysql_secure_installation

default answers (see below) are fine for a normal setup

  Enter current password for root (enter for none): --> should be empty, just press Enter
  Set root password? [Y/n] --> Y
  Remove anonymous users? [Y/n] --> Y
  Disallow root login remotely? [Y/n] -->  Y
  Remove test database and access to it? [Y/n] --> Y
  Reload privilege tables now? [Y/n] --> Y

Now login on mysql as root with the password just choosen
  $ mysql -uroot -p
and create a database (and a user) for Zabbix
  MariaDB [(none)]> create database zabbix character set utf8 collate utf8_bin;
  MariaDB [(none)]> grant all privileges on zabbix.* to zabbix@localhost identified by '<mysql-zabbix-password>';
  MariaDB [(none)]> flush privileges;
  MariaDB [(none)]> quit;

Import initial schema and data for the Zabbix server with:
  zcat /usr/share/doc/zabbix-server-mysql/create.sql.gz | mysql -uzabbix -p zabbix
(when asked, type the <mysql-zabbix-password>)

Edit /etc/zabbix/zabbix_server.conf and set
  DBPassword=<mysql-zabbix-password>

Now install Zabbix web frontend
  sudo apt-get install zabbix-frontend-php zabbix-get

Set the [[http://php.net/manual/en/timezones.php|right timezone]] for you (mine is Europe/Rome)
  echo -e "<Directory \"/usr/share/zabbix\">\n   php_value date.timezone Europe/Rome\n</Directory>" | sudo tee /etc/apache2/conf-available/zabbix-local.conf
  sudo a2enconf zabbix-local

and restart Apache and Zabbix Server
  sudo systemctl restart apache2
  sudo systemctl restart zabbix-server

==== Install Zabbix 4 Local Agent =====

This step it is not mandatory, but really useful for monitoring the server itself through Zabbix. Follow the [[notes:install-zabbix4-agent-on-ubuntu16-debian9|instructions posted here]] to install the Agent. Then, proceed with this guide.

==== Configure Web UI =====

Now point your browser to
  http://your-webserver/zabbix/
and follow the wizard to configure Zabbix frontend and its access to the Mysql database .

Finally, when presented the Zabbix “Welcome” screen, enter the user name '//Admin//' with password '//zabbix//' to log in as a Zabbix superuser for the first time(then change immediately the password!)