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QEMU PC emulator version 0.9.1 (kvm-84), Copyright (c) 2003-2008 Fabrice Bellard
usage: qemu [options] [disk_image]
'disk_image' is a raw hard image image for IDE hard disk 0
Standard options:
-h or -help display this help and exit
-M machine select emulated machine (-M ? for list)
-cpu cpu select CPU (-cpu ? for list)
-smp n set the number of CPUs to 'n' [default=1]
-fda/-fdb file use 'file' as floppy disk 0/1 image
-hda/-hdb file use 'file' as IDE hard disk 0/1 image
-hdc/-hdd file use 'file' as IDE hard disk 2/3 image
-cdrom file use 'file' as IDE cdrom image (cdrom is ide1 master)
-drive [file=file][,if=type][,bus=n][,unit=m][,media=d][,index=i]
[,cyls=c,heads=h,secs=s[,trans=t]][,snapshot=on|off]
[,cache=writethrough|writeback|none][,format=f][,serial=s]
[,boot=on|off]
use 'file' as a drive image
-mtdblock file use 'file' as on-board Flash memory image
-sd file use 'file' as SecureDigital card image
-pflash file use 'file' as a parallel flash image
-boot [a|c|d|n] boot on floppy (a), hard disk (c), CD-ROM (d), or network (n)
-snapshot write to temporary files instead of disk image files
-m megs set virtual RAM size to megs MB [default=128]
-k language use keyboard layout (for example "fr" for French)
-audio-help print list of audio drivers and their options
-soundhw c1,... enable audio support
and only specified sound cards (comma separated list)
use -soundhw ? to get the list of supported cards
use -soundhw all to enable all of them
-usb enable the USB driver (will be the default soon)
-usbdevice name add the host or guest USB device 'name'
-name string set the name of the guest
-uuid %08x-%04x-%04x-%04x-%012x
specify machine UUID
Display options:
-nographic disable graphical output and redirect serial I/Os to console
-curses use a curses/ncurses interface instead of SDL
-no-frame open SDL window without a frame and window decorations
-alt-grab use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt)
-no-quit disable SDL window close capability
-sdl enable SDL
-portrait rotate graphical output 90 deg left (only PXA LCD)
-vga [std|cirrus|vmware|none]
select video card type
-full-screen start in full screen
-vnc display start a VNC server on display
-name string set the name of the guest
-uuid %08x-%04x-%04x-%04x-%012x specify machine UUID
Network options:
-net nic[,vlan=n][,macaddr=addr][,model=type][,name=str]
create a new Network Interface Card and connect it to VLAN 'n'
-net user[,vlan=n][,name=str][,hostname=host]
connect the user mode network stack to VLAN 'n' and send
hostname 'host' to DHCP clients
-net tap[,vlan=n][,name=str][,fd=h][,ifname=name][,script=file][,downscript=dfile]
connect the host TAP network interface to VLAN 'n' and use the
network scripts 'file' (default=/etc/kvm-ifup)
and 'dfile' (default=/etc/kvm-ifdown);
use '[down]script=no' to disable script execution;
use 'fd=h' to connect to an already opened TAP interface
-net socket[,vlan=n][,name=str][,fd=h][,listen=[host]:port][,connect=host:port]
connect the vlan 'n' to another VLAN using a socket connection
-net socket[,vlan=n][,name=str][,fd=h][,mcast=maddr:port]
connect the vlan 'n' to multicast maddr and port
-net none use it alone to have zero network devices; if no -net option
is provided, the default is '-net nic -net user'
-tftp dir allow tftp access to files in dir [-net user]
-bootp file advertise file in BOOTP replies
-smb dir allow SMB access to files in 'dir' [-net user]
-redir [tcp|udp]:host-port:[guest-host]:guest-port
redirect TCP or UDP connections from host to guest [-net user]
-bt hci,null dumb bluetooth HCI - doesn't respond to commands
-bt hci,host[:id]
use host's HCI with the given name
-bt hci[,vlan=n]
emulate a standard HCI in virtual scatternet 'n'
-bt vhci[,vlan=n]
add host computer to virtual scatternet 'n' using VHCI
-bt device:dev[,vlan=n]
emulate a bluetooth device 'dev' in scatternet 'n'
i386 target only:
-win2k-hack use it when installing Windows 2000 to avoid a disk full bug
-rtc-td-hack use it to fix time drift in Windows ACPI HAL
-no-fd-bootchk disable boot signature checking for floppy disks
-no-acpi disable ACPI
-no-hpet disable HPET
Linux boot specific:
-kernel bzImage use 'bzImage' as kernel image
-append cmdline use 'cmdline' as kernel command line
-initrd file use 'file' as initial ram disk
Debug/Expert options:
-serial dev redirect the serial port to char device 'dev'
-parallel dev redirect the parallel port to char device 'dev'
-monitor dev redirect the monitor to char device 'dev'
-pidfile file write PID to 'file'
-S freeze CPU at startup (use 'c' to start execution)
-s wait gdb connection to port
-p port set gdb connection port [default=1234]
-d item1,... output log to /tmp/qemu.log (use -d ? for a list of log items)
-hdachs c,h,s[,t]
force hard disk 0 physical geometry and the optional BIOS
translation (t=none or lba) (usually qemu can guess them)
-L path set the directory for the BIOS, VGA BIOS and keymaps
-bios file set the filename for the BIOS
-no-kvm disable KVM hardware virtualization
-no-kvm-irqchip disable KVM kernel mode PIC/IOAPIC/LAPIC
-no-kvm-pit disable KVM kernel mode PIT
-no-kvm-pit-reinjection disable KVM kernel mode PIT interrupt reinjection
-enable-nesting enable support for running a VM inside the VM (AMD only)
-pcidevice host=bus:dev.func[,dma=none][,name=string]
expose a PCI device to the guest OS.
dma=none: don't perform any dma translations (default is to use an iommu)
'string' is used in log output.
-no-reboot exit instead of rebooting
-no-shutdown stop before shutdown
-loadvm [tag|id]
start right away with a saved state (loadvm in monitor)
-daemonize daemonize QEMU after initializing
-tdf inject timer interrupts that got lost
-kvm-shadow-memory megs set the amount of shadow pages to be allocated
-mem-path set the path to hugetlbfs/tmpfs mounted directory, also
enables allocation of guest memory with huge pages
-mem-prealloc toggles preallocation of -mem-path backed physical memory
at startup. Default is enabled.
-option-rom rom load a file, rom, into the option ROM space
-clock force the use of the given methods for timer alarm.
To see what timers are available use -clock ?
-localtime set the real time clock to local time [default=utc]
-startdate select initial date of the clock
-icount [N|auto]
enable virtual instruction counter with 2^N clock ticks per instruction
-echr chr set terminal escape character instead of ctrl-a
-virtioconsole c
set virtio console
-show-cursor show cursor
-tb-size n set TB size
-incoming p prepare for incoming migration, listen on port p
During emulation, the following keys are useful:
ctrl-alt-f toggle full screen
ctrl-alt-n switch to virtual console 'n'
ctrl-alt toggle mouse and keyboard grab
When using -nographic, press 'ctrl-a h' to get some help.
root@lsfks19:~# kvm >kvm.cmd
open /dev/kvm: No such file or directory
Could not initialize KVM, will disable KVM support
root@lsfks19:~# vim kvm.cmd
QEMU PC emulator version 0.9.1 (kvm-84), Copyright (c) 2003-2008 Fabrice Bellard
usage: qemu [options] [disk_image]
'disk_image' is a raw hard image image for IDE hard disk 0
Standard options:
-h or -help display this help and exit
-M machine select emulated machine (-M ? for list)
-cpu cpu select CPU (-cpu ? for list)
-smp n set the number of CPUs to 'n' [default=1]
-fda/-fdb file use 'file' as floppy disk 0/1 image
-hda/-hdb file use 'file' as IDE hard disk 0/1 image
-hdc/-hdd file use 'file' as IDE hard disk 2/3 image
-cdrom file use 'file' as IDE cdrom image (cdrom is ide1 master)
-drive [file=file][,if=type][,bus=n][,unit=m][,media=d][,index=i]
[,cyls=c,heads=h,secs=s[,trans=t]][,snapshot=on|off]
[,cache=writethrough|writeback|none][,format=f][,serial=s]
[,boot=on|off]
use 'file' as a drive image
-mtdblock file use 'file' as on-board Flash memory image
-sd file use 'file' as SecureDigital card image
-pflash file use 'file' as a parallel flash image
-boot [a|c|d|n] boot on floppy (a), hard disk (c), CD-ROM (d), or network (n)
-snapshot write to temporary files instead of disk image files
-m megs set virtual RAM size to megs MB [default=128]
-k language use keyboard layout (for example "fr" for French)
-audio-help print list of audio drivers and their options
-soundhw c1,... enable audio support
and only specified sound cards (comma separated list)
use -soundhw ? to get the list of supported cards
use -soundhw all to enable all of them
-usb enable the USB driver (will be the default soon)
-usbdevice name add the host or guest USB device 'name'
-name string set the name of the guest
-uuid %08x-%04x-%04x-%04x-%012x
specify machine UUID
Display options:
-nographic disable graphical output and redirect serial I/Os to console
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