MRTG (Multi Router Traffic Grapher) – a tool for displaying various data in graphs.
The installation command in Ubuntu/Debian:
sudo apt-get install mrtg snmp snmpd
In CentOS:
yum install mrtg net-snmp net-snmp-utils
The command below can tell you which additional modules are in the repository:
apt-cache search mrtg
Open the configuration file /etc/snmp/snmpd.conf
sudo nano /etc/snmp/snmpd.conf
Comment on the line:
com2sec paranoid default public
And uncomment the line:
com2sec readonly default public
Restart snmpd so that changes to the configuration file take effect:
sudo /etc/init.d/snmpd restart
You can check snmp by commands:
netstat -nlp | grep snmpd snmpwalk -v2с -c public localhost
Beginners can generate a simple configuration file with the command:
sudo cfgmaker public@localhost >> /etc/mrtg.cfg
where public is the name of the community (the password is in other words), and localhost is the host address or ip.
Example of starting the configuration file /etc/mrtg.cfg:
WorkDir: /var/www/mrtg Options[_]: growright, bits, nobanner Background[_]: #B0C4DE EnableIPv6: no Language: russian EnableSnmpV3: no Interval: 10 Refresh: 600 Include: /etc/mrtg/server1.cfg Include: /etc/mrtg/server2.cfg
Create the working directory:
sudo mkdir /var/www/mrtg
Then you must write or generate the index.html file with the command:
sudo indexmaker /etc/mrtg.cfg > /var/www/mrtg/index.html
We look at the log /var/log/mrtg.log so that there are no errors.
Here is an example of setting up SNMP on D-Link switches:
private CommunityView Read Write public CommunityView Read Only
Example of a manual start script (mrtg.sh):
#!/bin/bash #run mrtg LANG=C export $LANG /usr/bin/mrtg /etc/mrtg.cfg --logging /var/log/mrtg.log