Sorry for the newbie question!
I have data of an inventory of my virtual servers. So far it has been a piece of cake building a visualization of my servers grouped by Operating Systems, so I´ve got a nice graph showing how many RHEL 5, RHEL 6, RHEL 7, RHEL 8, Windows 2008, Windows 2012, Windows 2012, Windows 2016, an so on.
But I would like to build a visualization where I aggregate my servers under the general categories "Windows", "Red Hat Linux", "Other Linux", and so on ...
How could I do this?
Thanks in advance,