SNMP Troubleshooting Tips
SNMP logs events to
/var/log/messages The key to solving SNMP issues is to examine that log file.
Also check /etc/hosts.deny it could be that someone has disabled snmpd by adding an entry there. This will look similar to this:
cat /etc/hosts.deny snmpd:ALL
To see if the service is running, do one of the following two things:
service snmpd status
ps -ef | grep snmpd
Both these commands will also show you with what flags
snmpd was started.
The configuration file for snmp is in /etc/snmpd/snmpd.conf and the service startup (snmpd) configuration file is in a different location depending on the distribution.
Try this on Ubuntu
or this on CentOS/Redhat
To configure snmpd, use this utility:
snmpconf -g basic_setup
Follow the tags in our knowledgebase to get more tips on working with SNMP.