Open source is a laugh
Specifically, in these example configuration files for the network monitoring suite Nagios, they provide a monitoring configuration for a Windows machine and one for a Linux box:
# Linux host definition template - This is NOT a real host, just a template!
define host{
name linux-server ; The name of this host template
notification_period workhours ; Linux admins hate to be woken up, so we only notify during the day
}
# Windows host definition template - This is NOT a real host, just a template!
define host{
name windows-server ; The name of this host template
notification_period 24x7 ; Send notification out at any time - day or night
}
A slight bias against Windows admins, perhaps?