创建用户：
use mysql;
grant all privileges on *.* to 'zabbix'@'%' identified by 'zabbixpasswd';
grant all privileges on *.* to 'zabbix'@'localhost' identified by 'zabbixpasswd';
flush privileges;
...
zabbix自定义监控项：
新增内存使用率：
浏览器打开zabbix页面——Configurationg——Templates——Template OS Linux——Items——Create Item——Name：memory used percent % ，Type：Calculated，Key：vm.mem...
