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I use qemu exclusively for my virtualization needs these days. I migrated away from virtualbox late in the 3.x era. Probably my biggest complaint is that the man page does not actually document all of the arguments to the emulator. For that you have to search the source code.

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Can you share some details? I have been trying to break into this. Much appreciated!

Any chance you could be more specific?

It looks like most of the internet has decided that qemu is too scary to use directly and therefore folks tend to use libvirt and various helper utilities. I keep trying them and find them unpleasant and insufficiently useful. So I use systemd units for autostart (as described in the Arch Linux wiki page) and call qemu from there. I often use bridged networking and often pass through PCIe devices (typically GPUs, NVMe disks, and NICs).

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