escape key
for -nographic
Ctrl-A X
Disk
create disk image
qemu-img create -f qcow2 win2k.img 4G
convert qcow2 to raw
qemu-img convert 32mb.qcow2 32mb.raw
mount disk image
losetup /dev/loop0 32mb.raw 
kpartx -a /dev/loop0 
mount /dev/mapper/loop0p1 /mnt/32mb
convert an image
qemu-img convert -f vmdk -O raw image.vmdk image.img
qemu-img convert imagefile.dd -O vmdk vmdkname.vmdk
Change floppy disk on the fly
(qemu) change floppy0 /path/to/floppy.img
qemu-system-i386 -drive format=raw,file=./128mb.raw -m 128 -net nic,model=rtl8139 -net user -cdrom ./FD12LGCY.iso -drive format=raw,if=floppy,index=0,file=./FLOPPY.img -boot a
booting a readonly disk dump
https://wiki.qemu.org/Documentation/CreateSnapshot
qemu-system-x86_64 -display none -vnc :0 -m 8192 -hda /mnt/sda1/win10.hdd -snapshot
virsh pool-list
virsh vol-list default
https://people.redhat.com/pbonzini/qemu-test-doc/_build/html/topics/disk_005fimages.html
Temp
1265  qemu-img 
  1266  qemu-img –help
  1267  qemu-img create -f raw win2k.img 4G
  1269  qemu-system-i386 -hda win2k.img -m 384 -boot c -vga cirrus -net nic,model=rtl8139 -net user
  1270  qemu-system-i386 -hda win2k.img -m 384 -boot c -vga cirrus -net nic,model=rtl8139 -net user  -usb -soundhw sb16 -localtime -cdrom EN_WIN2000_PRO_SP4.ISO
  1271  qemu-img create -f qcow2 win2k.img 4G
  1272  qemu-system-i386 -hda win2k.img -m 384 -boot c -vga cirrus -net nic,model=rtl8139 -net user  -usb -soundhw sb16 -localtime -cdrom EN_WIN2000_PRO_SP4.ISO
  1273  qemu-system-i386 -hda win2k.img -m 384 -boot c -vga cirrus emu  -usb -soundhw sb16 -localtime -cdrom EN_WIN2000_PRO_SP4.ISO -vnc
  1274  qemu-system-i386 -hda win2k.img -m 384 -boot c -vga cirrus -net nic,model=rtl8139 -net user  -usb -soundhw sb16 -localtime -cdrom EN_WIN2000_PRO_SP4.ISO -vnc :0
  1589  qemu-system-i386 -m 128m -nographic
  1590  qemu-system-i386 -m 128M -nographic
  1609  qemu-system-ppc
  1610  man qemu-system-ppc
  1611  qemu-system-ppc -m 32M -nographic -s -S -kernel zImage_ts_140-3.bin
  1612  qemu-system-ppc -m none 32M -nographic -s -S -kernel zImage_ts_140-3.bin
  1613  qemu-system-ppc –machine none -m 32M -nographic -s -S -kernel zImage_ts_140-3.bin
  1614  qemu-system-ppc –machine none -m 32M -nographic -kernel zImage_ts_140-3.bin
  1615  qemu-system-ppc -m 32M -nographic -kernel zImage_ts_140-3.bin
  1616  qemu-system-ppc -m 32M -nographic 
  1617  qemu-system-ppc -m 32M -nographic zImage_ts_140-3.bin
  1618  qemu-system-ppc -m 32M -nographic -raw zImage_ts_140-3.bin
  1619  qemu-system-ppc -m 32M -nographic 
  1621  qemu-system-arm 
  1622  qemu-system-arm -machine raspi -nographic -m 128M
  1623  qemu-system-arm -machine raspi2 -nographic -m 128M
  1630  qemu-system-arm -machine raspi2 -nographic -m 128M recovery.bin 
  1631  qemu-system-arm -machine raspi2 -nographic -m 128M -kernel recovery.bin 
  1632  qemu-system-arm -machine raspi2 -nographic -m 256M -kernel recovery.bin 
  1639  qemu-system-arm -machine raspi2 -nographic -m 256M -kernel raspbian_lite_latest 
  1640  qemu-system-arm -machine raspi2 -nographic -m 256M -kernel pieeprom.bin 
  1641  qemu-system-arm -machine raspi2 -nographic -m 256M -kernel pieeprom.bin -hda raspbian_lite_latest 
  1652  qemu-system-arm -machine raspi2 -nographic -m 256M -kernel 2019-07-10-raspbian-buster-lite.img 
  1653  qemu-system-arm -machine raspi2 -nographic -m 256M -hda 2019-07-10-raspbian-buster-lite.img 
  1654  qemu-system-arm -machine raspi2 -nographic -m 256M 2019-07-10-raspbian-buster-lite.img 
  1655  qemu-system-arm -machine raspi2 -nographic -m 256M -raw 2019-07-10-raspbian-buster-lite.img 
  1656  man qemu
  1657  man qemu-system
  1658  qemu-system-arm -machine raspi2 -nographic -m 256M =format=raw 2019-07-10-raspbian-buster-lite.img 
  1659  qemu-system-arm -machine raspi2 -nographic -m 256M format=raw 2019-07-10-raspbian-buster-lite.img 
  1660  qemu-system-arm -machine raspi2 -nographic -m 256M -drive format=raw,2019-07-10-raspbian-buster-lite.img 
  1661  qemu-system-arm -machine raspi2 -nographic -m 256M -hda format=raw,2019-07-10-raspbian-buster-lite.img 
  1662  qemu-system-arm -machine raspi2 -nographic -m 256M -hda format=raw,media=2019-07-10-raspbian-buster-lite.img 
  1663  qemu-system-arm -machine raspi2 -nographic -m 256M -drive format=raw,media=2019-07-10-raspbian-buster-lite.img 
  1664  qemu-system-arm -machine raspi2 -nographic -m 256M -drive format=raw,file=2019-07-10-raspbian-buster-lite.img 
  1665  qemu-system-arm -machine raspi2 -m 256M -drive format=raw,file=2019-07-10-raspbian-buster-lite.img 
kernel/raw/master/versatile-pb.dtb
  1710  qemu-system-ppc
  1711  qemu-system-sparc
  1713  qemu-system-x86_64