There’s a simple built-in command line tool you can utilize to discover the current version of macOS:
The result will look something like this:
If you would like to see the OS version, there’s a flag for that:
From a Debian Linux-based OS like Ubuntu, two commands will tell you about your system:
Here’s what the latter command might output:
Another way to verify which operating system is currently running on your dedicated server is to log into your customer dashboard. Once you’ve selected a server you can view the installed operating system on the bottom left alongside its hardware configuration as well as it’s IP address.