I have Kubuntu 22.04 installed.  It takes 33GB for the OS and the software I installed.  Here's what df -h returns
/dev/sda1                 916G   33G  837G   4% /
/dev/sdb1                 1.9T  1.5T  277G  85% /home/

I've been referring to windows as Bill's bugware.  I guess I should start calling it Bill's bloatware.

as I expected

On Tue, May 28, 2024 at 2:28 PM rusty via PLUG-discuss <plug-discuss@lists.phxlinux.org> wrote:

hmm.  I thought he was asking about WINDOWs fitting.  But while we're on the topic of Linux fitting, here's my Linux DF for / and /home:

/dev/sda2        37G   26G  9.6G  73% /

/dev/sdb2       1.8T  1.7T   18G  99% /home

So, ignoring home, my laptop Linux Mint fits fine in 30G.  And I've got LOTS of 'junk' loaded.  At my last job, I allocated around 30G for the Linux partition, if I remember right, which was pretty much a default install of Linux Mint.

That being said, here are some sizes for the virtual PCs I've created for the class I teach:

Ubuntu2.2: 28.92 GB

Ubuntu2.2: 25.85 GB.

MicroOS: 34.46GB

EdUbuntu: 24.0GB

CentOS: 30.15GB

Note that these were 'mostly' 'standard' installs, but obviously YMMV! (especially since MY mileage varied!)

Now, I also did a Windows install, W11 or W10 I think, and I don't think I added much to it, and it took 50.0GB

So, for Windows I agree that you're probably out of luck getting it in to 30GB! ;-)