MRTG
MRTG可以分析网络流量，但是它必须依赖SNMP协议。将收集到的数据生成HTML文件，以图片的形式展示出来
1、安装一些依赖软件
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[root@localhost bandwidthd-2.0.1]# yum install -y net-snmp
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2、配置snmp，编辑配置文件“/etc/snmp/snmpd.conf”
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[root@localhost bandwidthd]# gedit /etc/snmp/snmpd.conf
view systemview included .1.3.6.1.2.1.1
view systemview included .1.3.6.1.2.1.25.1.1
view systemview included .1.3.6.1.2.1.2
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3、启动snmp服务
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[root@localhost bandwidthd]# service snmpd start
正在启动snmpd： [确定]
[root@localhost bandwidthd]#
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4、下载bandwidthd软件（https://oss.oetiker.ch/mrtg/pub/?M=D），或者以yum方式在线安装
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[root@localhost bandwidthd]# yum install -y mrtg
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5、修改配置文件”/etc/httpd/conf.d/mrtg.conf”
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[root@localhost bandwidthd]# gedit /etc/httpd/conf.d/mrtg.conf
<Location /mrtg>
Order deny,allow
# Deny from all //这句要注释掉
Allow from all //这里为all，允许检测所有ip
Allow from ::1
# Allow from .example.com
</Location>
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6、生成mrtg文件，并做一些修改。
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[root@localhost bandwidthd]# cfgmaker public@192.168.0.113>/etc/mrtg/mrtg.cfg //生成文件，注意ip地址需要用户自己设置
[root@localhost bandwidthd]# gedit /etc/mrtg/mrtg.cfg //修改文件
# for UNIX
WorkDir: /var/www/mrtg //当前处于centos系统，因此这句去掉注释.这个路径是apache下的网页路径
# or for NT
# WorkDir: c:\mrtgdata
### Global Defaults
# to get bits instead of bytes and graphs growing to the right
Options[_]: growright, bits //去掉注释
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7、生成html文件，执行三次指令
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[root@localhost bandwidthd]# env LANG=C mrtg /etc/mrtg/mrtg.cfg //第一次
2018-08-22 14:50:00, Rateup WARNING: /usr/bin/rateup could not read the primary log file for 192.168.0.113_2
2018-08-22 14:50:00, Rateup WARNING: /usr/bin/rateup The backup log file for 192.168.0.113_2 was invalid as well
2018-08-22 14:50:00, Rateup WARNING: /usr/bin/rateup Can't remove 192.168.0.113_2.old updating log file
2018-08-22 14:50:00, Rateup WARNING: /usr/bin/rateup Can't rename 192.168.0.113_2.log to 192.168.0.113_2.old updating log file
[root@localhost bandwidthd]# env LANG=C mrtg /etc/mrtg/mrtg.cfg //第二次
[root@localhost bandwidthd]# env LANG=C mrtg /etc/mrtg/mrtg.cfg //第三次
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8、在浏览器输入“127.0.0.1/mrtg/192.168.0.113_2.html”,这样就可以访问了
