Downloads
Arch Linux: pacman -S qemu
Debian: apt install qemu
macOS: brew install qemu
Main applications
qemu-system-x86 – Run QEMU on x86 architecture
qemu-system-x86_64 – Run QEMU on x64 architecture
Commands
Processor
-cpu <CPU> – Specify processor architecture
-cpu ? – List supported architectures
-cpu host – Emulate host processor
-smp <NUMBER> – Specify number of cores
RAM
-m <MEMORY> – Specify amount of memory (default: 128 MB) (M = MB, G = GB)
HDD
qemu-img create <FILENAME.IMG> <SIZE> – Create raw disk image
CD-ROM
-cdrom /dev/cdrom – Mount host drive as virtual CD-ROM
-cdrom <FILE> – Mount image file as virtual CD-ROM
Boot
-boot c – Boot from virtual hard drive
-boot d -Boot from virtual CD-ROM drive
-boot n – Boot from virtual network
GPU
-vga [cirrus|std|vmware|qxl]
Network
-net nic -net user – Pass-trough of host network connection
-smb <PATH> – Shared folder, available at \\10.0.2.4\qemu