comandos

sudo su
systemctl disable firewalld
systemctl stop firewalld
systemctl status firewalld
yum update
yum install vim
yum install kate
kate /etc/sysconfig/selinux
*disabled
shutdown -h now
rpm -ivh http://repo.zabbix.com/zabbix/3.0/rhel/7/x86_64/zabbix-release-3.0-1.el7.noarch.rpm
yum install zabbix-server-mysql zabbix-web-mysql zabbix-agent
yum install mariadb-server
service mariadb start
/usr/bin/mysql_secure_installation
service mariadb restart
systemctl enable mariadb.service
mysql -uroot -p
create database zabbix character set utf8 collate utf8_bin;
grant all privileges on zabbix.* to zabbix@localhost identified by 'zabbix';
                        "BANCO"     "DB USER"                      "DB PASS"
quit;
cd /usr/share/doc/zabbix-server-mysql "usar o tab pra completar"
zcat create.sql.gz | mysql -uroot -p zabbix
kate /etc/zabbix/zabbix_server.conf
" descomentar
DBHost=localhost
DBName=zabbix
DBUser=zabbix
DBPassword=zabbix
"          COLOCAR O PASS AQUI, VAI ESTAR EM BRANCO

systemctl start zabbix-server
kate /etc/httpd/conf.d/zabbix.conf
" descomentar e atualizar
php_value max_execution_time 300
php_value memory_limit 128M
php_value post_max_size 16M
php_value upload_max_filesize 2M
php_value max_input_time 300
php_value always_populate_raw_post_data -1
php_value date.timezone America/Belem
"
systemctl httpd start
systemctl enable httpd.service
systemctl enable mariadb.service
systemctl enable zabbix-server.service
systemctl enable zabbix-agent.service

"depois navega até o ip/zabbix Admin / zabbix"