Hi,
How can we get alerts when Windows or Linux or Solaris OS is restarted?
TRIGGER CONDITION
Type of Property to Monitor: Node
Trigger Alert: Last Boot has changed
There is an out of the box alert labeled "Alert me when a node reboots" that is already pre-configured for this very use case.
as aLTeReGo mentioned there is an OOTB alert for node rebooted, that actually looks for the restarrt of the SNMP agent, which is not useful if your admins restart the daemon/service.
If system supports the host resource MIB (and the NET-SNMP commonly found on Linux and Solaris does) then look at: hrSystemUptime.UnDP and http://thwack.solarwinds.com/docs/DOC-170682
This alert is meaningless when it comes to Windows or Linux OS restart
Why is that? If you're concerned about SNMP service restarts triggering false alarms then you can switch your polling method to WMI for Windows Nodes. For Linux/Unix hosts you can easily write a quick bash script monitor in SAM that returns the output of the uptime command. Neither of these options would be dependant upon the SNMP daemon keeping track of timeticks.