If anyone knows the OID for Linux system OS ver kindly share..
The common net-snmp service in most linux distro's doesn't include that info natively, you have to extend it and set up a custom poller in Orion to check whatever value you set in the extended tables. This is discussed in this previous post:
How Can I poll the OS version for Linux Servers?
An alternative that may be simpler is just to use the Linux agent that Solarwinds released with SAM 6.3, it basically does away with everything that linux net-snmp gets wrong.
-Marc Netterfield
Loop1 Systems: SolarWinds Training and Professional Services