Install SNMP and Configure the Community String For CentOS

Install SNMP

Install the SNMPD service by running the following command:

yum install net-snmp net-snmp-utils

Once the service is installed, verify that it is set to start at startup by running:

CentOS 6:

chkconfig snmpd on

CentOS 7:

systemctl enable snmpd

Configure SNMP

Make a backup of the original configuration file by running:

mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.orig

Create a new SNMP configuration file by running:

touch /etc/snmp/snmpd.conf

Once you have the new configuration file, generate a random string for the SNMP community string using a tool such as passwordsgenerator.net
Once you have the string, edit /etc/snmp/snmpd.conf and add the following line, replacing [RANDOM_STRING] with the generated string:rocommunity [RANDOM_STRING]
Save the configuration file, and finally start the SNMP service by running:

CentOS 6:

service snmpd restart

CentOS 7:

systemctl restart snmpd
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