After 10 years using Linux server my boss bough a new application that runs on Windows server with Apache.

It's just like when my son returns to an old play ground and finds the sand box.

P.S. Please give me a suggestion: what FTP server shall I use?

Don't use FTP, it is inherently insecure and should be avoided. Go for SFTP instead. All you need is an SSH-Server and IIRC nowadays even Windows comes with one out of the box.

@TobiSGD Yup, it does

Qemu -> w10 -> your_windows_application

I'm doing exactly that at the moment. VUGen does not run on linux so I've spun up a windows wm for it alone

ftpd

@netikras Is qemu much better than vbox? I've not done much with it.

@owenw idk, I like it better tho. While vbox offers some nice bells, like seamless mode and so, I like the idea of true linux virtualization and open protocols [spice], remote access to VMs.
Also I've had some vbox crashes back when I was using it. I guess that was what pushed me towards qemu, which was a lil more difficult to set up back then.

Also idk whether vbox has this now - I love the ability to give away some of my hardware devices [pci/usb] to the guest. If I have 2 gpus I can dedicate one of them to the guest. Attach a monitor to it, plug in another set of kbd/mouse and give them away to the vm too. And there, you have a full blown another 'computer' with HIDs.

I know vbox can do this with usb devices. Not sure whether it does the same with PCIs.

Also it might be just my biased judgement, but I feel like qemu is faster than vbox. Not the ui part, as spice is somewhat slow [but got much better lately!], but the whole vm, all the cpu/mem interactions. Take this with a grain of salt tho.