STEP 1: Install EPEL Repository

Click on the below link and install the Epel repository according to your operating system.

Setup EPEL YUM Repositories on CentOS RHEL Fedora Linux

STEP 2:  Update Package Repositories:

Make sure your system’s package repositories are up to date by running the following commands:

Here we are creating a basic installation of the apache web server.

STEP 3:  Install the Apache web server.

#yum -y install httpd

Start the apache web service.

#systemctl start httpd.service

Enable service on auto boot

#systemctl enable httpd.service

STEP 3 :  Install MRTG through YUM

Below command is for mrtg and snmp installation  utility and dependency .

# yum -y install net-snmp mrtg net-snmp-utils

STEP 4 : Configure SNMP 

For monitor network interface and other resources like CPU , memory , we should configure snmpd “/etc/snmp/snmpd.conf” .

STEP 5 : Edit the configuration file.

# vim /etc/snmp/snmpd.conf

Now make change as i have describe below.

(a) comment the line with hash on line number 41 like below.

# com2sec notConfigUser default public

(b) uncomment  the line number 74,75  ,remove NETWORK/24 and replace with your network.

Before changes

#com2sec local localhost COMMUNITY
#com2sec mynetwork NETWORK/24 COMMUNITY
After Changes 
com2sec local localhost techtransit
com2sec mynetwork techtransit

(c) un comment  the line 78,79 . Replace techtransit from your any word.

group MyRWGroup v2c local
group MyROGroup v2c mynetwork

(d) uncomment the line 85 .

view all included  .1  80

(f) uncomment the line 93,94 . Replace techtransit from your name.

access MyROGroup "" v2c noauth 0 all none none
access MyRWGroup "" v2c noauth 0 all all all

STEP 6 : Start the snmpd service and enable from autoboot .

#systemctl start snmpd.service

#systemctl enable snmpd.service

STEP 7 :

# show status (replace the “techtransit” to your comunity name)
[root@server ~]# snmpwalk -v2c -c techtransit localhost system
SNMPv2-MIB::sysDescr.0 = STRING: Linux 3.10.0-229.14.1.el7.x86_64 #1 SMP Tue Sep 15 15:05:51 UTC 2015 x86_64
SNMPv2-MIB::sysObjectID.0 = OID: NET-SNMP-MIB::netSnmpAgentOIDs.10
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (8004) 0:01:20.04
SNMPv2-MIB::sysContact.0 = STRING: Root <root@localhost> (configure /etc/snmp/snmp.local.conf)
SNMPv2-MIB::sysName.0 = STRING:
SNMPv2-MIB::sysLocation.0 = STRING: Unknown (edit /etc/snmp/snmpd.conf)
SNMPv2-MIB::sysORLastChange.0 = Timeticks: (2) 0:00:00.02
SNMPv2-MIB::sysORID.1 = OID: SNMP-MPD-MIB::snmpMPDCompliance
SNMPv2-MIB::sysORID.3 = OID: SNMP-FRAMEWORK-MIB::snmpFrameworkMIBCompliance
SNMPv2-MIB::sysORID.4 = OID: SNMPv2-MIB::snmpMIB
SNMPv2-MIB::sysORID.6 = OID: IP-MIB::ip
SNMPv2-MIB::sysORID.9 = OID: SNMP-NOTIFICATION-MIB::snmpNotifyFullCompliance
SNMPv2-MIB::sysORDescr.1 = STRING: The MIB for Message Processing and Dispatching.
SNMPv2-MIB::sysORDescr.2 = STRING: The management information definitions for the SNMP User-based Security Model.
SNMPv2-MIB::sysORDescr.3 = STRING: The SNMP Management Architecture MIB.
SNMPv2-MIB::sysORDescr.4 = STRING: The MIB module for SNMPv2 entities
SNMPv2-MIB::sysORDescr.5 = STRING: The MIB module for managing TCP implementations
SNMPv2-MIB::sysORDescr.6 = STRING: The MIB module for managing IP and ICMP implementations
SNMPv2-MIB::sysORDescr.7 = STRING: The MIB module for managing UDP implementations
SNMPv2-MIB::sysORDescr.8 = STRING: View-based Access Control Model for SNMP.
SNMPv2-MIB::sysORDescr.9 = STRING: The MIB modules for managing SNMP Notification, plus filtering.
SNMPv2-MIB::sysORDescr.10 = STRING: The MIB module for logging SNMP Notifications.
SNMPv2-MIB::sysORUpTime.1 = Timeticks: (2) 0:00:00.02
SNMPv2-MIB::sysORUpTime.2 = Timeticks: (2) 0:00:00.02
SNMPv2-MIB::sysORUpTime.3 = Timeticks: (2) 0:00:00.02
SNMPv2-MIB::sysORUpTime.4 = Timeticks: (2) 0:00:00.02
SNMPv2-MIB::sysORUpTime.5 = Timeticks: (2) 0:00:00.02
SNMPv2-MIB::sysORUpTime.6 = Timeticks: (2) 0:00:00.02
SNMPv2-MIB::sysORUpTime.7 = Timeticks: (2) 0:00:00.02
SNMPv2-MIB::sysORUpTime.8 = Timeticks: (2) 0:00:00.02
SNMPv2-MIB::sysORUpTime.9 = Timeticks: (2) 0:00:00.02
SNMPv2-MIB::sysORUpTime.10 = Timeticks: (2) 0:00:00.02

Creating MRTG Configuration :

Now we will create a configuration file for mrtg data storage, run the command below and output will redirect in the mrtg configuration file.Replace your community name and ip of your server.You can also change WorkDir .

[root@server ~]#cfgmaker --snmp-options=:::::2 --ifref=descr --ifdesc=descr --global 'WorkDir: /var/www/html/mymrtg' [email protected] > /etc/mrtg/mrtg.cfg

If you want the graph data in bits instead of bytes , uncomment the below lines from /etc/mrtg/mrtg.cfg configuration file.

#vim /etc/mrtg/mrtg.cfg

Options[_]: growright, bits

Uncomment the below line , which should on line 75  and save and exit from the configuraiton file.

Target[]: \eth0:[email protected]:::::2
noHC[]: yes
SetEnv[]: MRTG_INT_IP="" MRTG_INT_DESCR="eth0"
MaxBytes[]: 250000000
Title[]: eth0 --
PageTop[]: <h1>eth0 --</h1>
Create Index File on mrtg document root through below command.
indexmaker --columns=1 /etc/mrtg/mrtg.cfg > /var/www/html/mymrtg/index.html

Now MRTG Configure on apache configuration file.

Edit the mrtg apache configuration file.

#vim /etc/httpd/conf.d/mrtg.conf

Edit the file like below , change the ip with your ip .

Alias /mrtg /var/www/html/mymrtg

<Location /var/www/html/mymrtg>
Require local
Require ip
# Require host

Start Apache :

#systemctl start httpd.service

Now  configuration of mrtg has been done and access URL for MRTG Graph will be like below.

http://server-hostname or IP Address/mymrtg

Thank you 🙂

By Sachin G

I am a professional freelance contributor and founder of tech transit. Love to write and lover of education, culture, and community. I have been using it, setting, supporting, and maintaining it since 2009.Linux rocks! Sachin G Follow me on LinkedIn and x formerly twitter