Apps that depend on talking to specific hardware ( including the GPU) do not always work in a VM.

Unless you go about setting up IOMMU groups with QEMU/KVM… (And have a second GPU to hand over to the VM.)

KVM, QEMU, Looking Glass

Or the new Ubuntu Cinnamon

Get a Pixel, Install GrapheneOS.

I chose to use the copypasta because it does an excellent job at answering the question asked, ‘What is Linux?’.

The answer being that it is but one part of a complete OS, rather than the OS itself, and that if he chooses, he may indeed be able to incorporate the kernel into his own OS project.

Nobody said you have to use GNU, just that it’s by far the most common form in which a Linux-based operating system takes.

I’d just like to interject for a moment. What you’re refering to as Linux, is in fact, GNU/Linux, or as I’ve recently taken to calling it, GNU plus Linux. Linux is not an operating system unto itself, but rather another free component of a fully functioning GNU system made useful by the GNU corelibs, shell utilities and vital system components comprising a full OS as defined by POSIX.

Many computer users run a modified version of the GNU system every day, without realizing it. Through a peculiar turn of events, the version of GNU which is widely used today is often called Linux, and many of its users are not aware that it is basically the GNU system, developed by the GNU Project.

There really is a Linux, and these people are using it, but it is just a part of the system they use. Linux is the kernel: the program in the system that allocates the machine’s resources to the other programs that you run. The kernel is an essential part of an operating system, but useless by itself; it can only function in the context of a complete operating system. Linux is normally used in combination with the GNU operating system: the whole system is basically GNU with Linux added, or GNU/Linux. All the so-called Linux distributions are really distributions of GNU/Linux!

Whatsapp web is pretty stable for me

In my experience, Brother printers have been the best. Litterally just Plug 'n play. I got a cheaper laser printer from them that only connects via USB, but I had no issue in setting it up with a raspberry pi running CUPS to get network-wide access that all my devices automatically recognise with no need for any manual setup by end users.