man kvm Command

Man page for apt-get kvm Command

Man Page for kvm in Linux

This tutorial shows the man page for man kvm in linux.

Open terminal with 'su' access and type the command as shown below:
man kvm

Result of the Command Execution shown below:

QEMU(1)                                                                                                                                                      QEMU(1)



NAME
       qemu doc   QEMU Emulator User Documentation

SYNOPSIS
       usage: qemu [options] [disk_image]

DESCRIPTION
       The QEMU PC System emulator simulates the following peripherals:

           i440FX host PCI bridge and PIIX3 PCI to ISA bridge

           Cirrus CLGD 5446 PCI VGA card or dummy VGA card with Bochs VESA extensions (hardware level, including all non standard modes).

           PS/2 mouse and keyboard

           2 PCI IDE interfaces with hard disk and CD ROM support

           Floppy disk

           PCI and ISA network adapters

           Serial ports

           Creative SoundBlaster 16 sound card

           ENSONIQ AudioPCI ES1370 sound card

           Intel 82801AA AC97 Audio compatible sound card

           Adlib(OPL2)   Yamaha YM3812 compatible chip

           Gravis Ultrasound GF1 sound card

           CS4231A compatible sound card

           PCI UHCI USB controller and a virtual USB hub.

       SMP is supported with up to 255 CPUs.

       Note that adlib, gus and cs4231a are only available when QEMU was configured with   audio card list option containing the name(s) of required card(s).

       QEMU uses the PC BIOS from the Bochs project and the Plex86/Bochs LGPL VGA BIOS.

       QEMU uses YM3812 emulation by Tatsuyuki Satoh.

       QEMU uses GUS emulation(GUSEMU32 ) by Tibor "TS" SchA~Xtz.

       Not that, by default, GUS shares IRQ(7) with parallel ports and so qemu must be told to not have parallel ports to have working GUS

               qemu dos.img  soundhw gus  parallel none

       Alternatively:

               qemu dos.img  device gus,irq=5

       Or some other unclaimed IRQ.

       CS4231A is the chip used in Windows Sound System and GUSMAX products

OPTIONS
       disk_image is a raw hard disk image for IDE hard disk 0. Some targets do not need a disk image.

       Standard options:

        h  Display help and exit

        version
           Display version information and exit

        M machine
           Select the emulated machine (" M ?" for list)

        cpu model
           Select CPU model ( cpu ? for list and additional feature selection)

        smp n[,cores=cores][,threads=threads][,sockets=sockets][,maxcpus=maxcpus]
           Simulate an SMP system with n CPUs. On the PC target, up to 255 CPUs are supported. On Sparc32 target, Linux limits the number of usable CPUs to 4.  For
           the PC target, the number of cores per socket, the number of threads per cores and the total number of sockets can be specified. Missing values will be
           computed. If any on the three values is given, the total number of CPUs n can be omitted. maxcpus specifies the maximum number of hotpluggable CPUs.

        numa opts
           Simulate a multi node NUMA system. If mem and cpus are omitted, resources are split equally.

        fda file
        fdb file
           Use file as floppy disk 0/1 image. You can use the host floppy by using /dev/fd0 as filename.

        hda file
        hdb file
        hdc file
        hdd file
           Use file as hard disk 0, 1, 2 or 3 image.

        cdrom file
           Use file as CD ROM image (you cannot use  hdc and  cdrom at the same time). You can use the host CD ROM by using /dev/cdrom as filename.

        drive option[,option[,option[,...]]]
           Define a new drive. Valid options are:

           file=file
               This option defines which disk image to use with this drive. If the filename contains comma, you must double it (for instance, "file=my,,file" to use
               file "my,file").

           if=interface
               This option defines on which type on interface the drive is connected.  Available types are: ide, scsi, sd, mtd, floppy, pflash, virtio.

           bus=bus,unit=unit
               These options define where is connected the drive by defining the bus number and the unit id.

           index=index
               This option defines where is connected the drive by using an index in the list of available connectors of a given interface type.

           media=media
               This option defines the type of the media: disk or cdrom.

           cyls=c,heads=h,secs=s[,trans=t]
               These options have the same definition as they have in  hdachs.

           snapshot=snapshot
               snapshot is "on" or "off" and allows to enable snapshot for given drive (see  snapshot).

           cache=cache
               cache is "none", "writeback", or "writethrough" and controls how the host cache is used to access block data.

           aio=aio
               aio is "threads", or "native" and selects between pthread based disk I/O and native Linux AIO.

           format=format
               Specify which disk format will be used rather than detecting the format.  Can be used to specifiy format=raw to avoid interpreting an untrusted
               format header.

           serial=serial
               This option specifies the serial number to assign to the device.

           addr=addr
               Specify the controller's PCI address (if=virtio only).

           By default, writethrough caching is used for all block device.  This means that the host page cache will be used to read and write data but write
           notification will be sent to the guest only when the data has been reported as written by the storage subsystem.

           Writeback caching will report data writes as completed as soon as the data is present in the host page cache.  This is safe as long as you trust your
           host.  If your host crashes or loses power, then the guest may experience data corruption.  When using the  snapshot option, writeback caching is used by
           default.

           The host page cache can be avoided entirely with cache=none.  This will attempt to do disk IO directly to the guests memory.  QEMU may still perform an
           internal copy of the data.

           Some block drivers perform badly with cache=writethrough, most notably, qcow2.  If performance is more important than correctness, cache=writeback should
           be used with qcow2.

           Instead of  cdrom you can use:

                   qemu  drive file=file,index=2,media=cdrom

           Instead of  hda,  hdb,  hdc,  hdd, you can use:

                   qemu  drive file=file,index=0,media=disk
                   qemu  drive file=file,index=1,media=disk
                   qemu  drive file=file,index=2,media=disk
                   qemu  drive file=file,index=3,media=disk

           You can connect a CDROM to the slave of ide0:

                   qemu  drive file=file,if=ide,index=1,media=cdrom

           If you don't specify the "file=" argument, you define an empty drive:

                   qemu  drive if=ide,index=1,media=cdrom

           You can connect a SCSI disk with unit ID 6 on the bus 

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