参考：
- http://www.tecmint.com/monitorix-a-lightweight-system-and-network-monitoring-tool-for-linux/
CentOS7下安装
# yum install rrdtool rrdtool-perl perl-libwww-perl perl-MailTools perl-MIME-Lite perl-CGI perl-DBI perl-XML-Simple perl-Config-General perl-HTTP-Server-Simple perl-IO-Socket-SSL wget
# wget http://www.monitorix.org/monitorix-3.8.1-1.noarch.rpm
# rpm -ivh monitorix-3.8.-.noarch.rpm
# vim /etc/monitorix/monitorix.conf #修改端口如 port =
# systemctl start monitorix
浏览器访问 http://ip:9000/monitorix/ 可看到效果