Hi I have installed nagios on one of my server and now i am tring to understand how to query my client machine using OIDs. But i just not understaing is one thing is how does one determine a a OID. I am following a tutorial by http://www.debianhelp.co.uk/linuxoids.htm . But what i don't seem to understand is how do they determin a OID.

Can some on help me with the concept of OIDs and how do i come up with my own OID

i followed the above tutorial and tried to query my clinet server to get the path where the disk is mounted but was not successful here ..

[root@vps libexec]# ./check_snmp -H 121.XXX.XX.11 -C public -o 1.3.6.1.4.1.2021.9.1.2.1 SNMP problem - No data received from host CMD: /usr/bin/snmpget -t 1 -r 5 -m '' -v 1 [authpriv] 121.XX.XX.XX:161 1.3.6.1.4.1.2021.9.1.2.1

can some one help me here

Thanks a million !!