NAME

       virt-get-kernel - Extract kernel and ramdisk from guests

SYNOPSIS

        virt-get-kernel [--options] -d domname

        virt-get-kernel [--options] -a disk.img

DESCRIPTION

       This option extracts the kernel and initramfs from a guest.

       The format of the disk image is automatically detected unless you specify it by using the --format
       option.

       In the case where the guest contains multiple kernels, the one with the highest version number is chosen.
       To extract arbitrary kernels from the disk image, see guestfish(1).  To extract the entire "/boot"
       directory of a guest, see virt-copy-out(1).

OPTIONS

       --help
           Display help.

       -a file
       --add file
           Add file which should be a disk image from a virtual machine.

           The  format  of  the disk image is auto-detected.  To override this and force a particular format use
           the --format option.

       -a URI
       --add URI
           Add a remote disk.  The URI format is compatible with guestfish.   See  "ADDING  REMOTE  STORAGE"  in
           guestfish(1).

       --colors
       --colours
           Use  ANSI  colour sequences to colourize messages.  This is the default when the output is a tty.  If
           the output of the program is redirected to a file, ANSI colour sequences are disabled unless you  use
           this option.

       -c URI
       --connect URI
           If  using  libvirt,  connect  to  the  given URI.  If omitted, then we connect to the default libvirt
           hypervisor.

           If you specify guest block devices directly (-a), then libvirt is not used at all.

       -d guest
       --domain guest
           Add all the disks from the named libvirt guest.  Domain UUIDs can be used instead of names.

       --echo-keys
           When prompting for keys and passphrases, virt-get-kernel normally turns echoing off so you cannot see
           what you are typing.  If you are not worried about Tempest attacks and there is no one  else  in  the
           room you can specify this flag to see what you are typing.

       --format raw|qcow2|..
       --format auto
           The  default for the -a option is to auto-detect the format of the disk image.  Using this forces the
           disk format for the -a option on the command line.

           If you have untrusted raw-format guest disk images, you should use this option to  specify  the  disk
           format.  This avoids a possible security problem with malicious guests (CVE-2010-3851).

       --keys-from-stdin
           Read  key  or  passphrase  parameters from stdin.  The default is to try to read passphrases from the
           user by opening /dev/tty.

       --machine-readable
           This option is used to make the output more machine friendly when being  parsed  by  other  programs.
           See "MACHINE READABLE OUTPUT" below.

       -o directory
       --output directory
           This option specifies the output directory where kernel and initramfs from the guest are written.

           If not specified, the default output is the current directory.

       --prefix prefix
           This option specifies a prefix for the extracted files.

           If a prefix is specified, then there will be a dash ("-") after the prefix and before the rest of the
           file  name;  for  example,  a  kernel  in  the  guest  like  "vmlinuz-3.19.0-20-generic"  is saved as
           "mydistro-vmlinuz-3.19.0-20-generic" when the prefix is "mydistro".

           See also --unversioned-names.

       -q
       --quiet
           Don't print ordinary progress messages.

       --unversioned-names
           This option affects the destination file name of extracted files.

           If enabled, files will be saved locally just with the base name; for example, kernel and  ramdisk  in
           the  guest like "vmlinuz-3.19.0-20-generic" and "initrd.img-3.19.0-20-generic" are saved respectively
           as "vmlinuz" and "initrd.img".

           See also --prefix.

       -v
       --verbose
           Enable verbose messages for debugging.

       -V
       --version
           Display version number and exit.

       -x  Enable tracing of libguestfs API calls.

MACHINE READABLE OUTPUT

       The --machine-readable option can be used to make the output more machine friendly, which is useful  when
       calling virt-get-kernel from other programs, GUIs etc.

       Use  the option on its own to query the capabilities of the virt-get-kernel binary.  Typical output looks
       like this:

        $ virt-get-kernel --machine-readable
        virt-get-kernel

       A list of features is printed, one per line, and the program exits with status 0.

ENVIRONMENT VARIABLES

       For other environment variables which affect all libguestfs  programs,  see  "ENVIRONMENT  VARIABLES"  in
       guestfs(3).

EXIT STATUS

       This program returns 0 if successful, or non-zero if there was an error.

SEE ALSO

       guestfs(3), guestfish(1), guestmount(1), virt-copy-out(1), http://libguestfs.org/.

AUTHOR

       Richard W.M. Jones http://people.redhat.com/~rjones/

COPYRIGHT

       Copyright (C) 2013-2017 Red Hat Inc.

LICENSE

       This  program  is  free  software;  you  can  redistribute it and/or modify it under the terms of the GNU
       General Public License as published by the Free Software Foundation; either version 2 of the License,  or
       (at your option) any later version.

       This  program  is  distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
       the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General  Public
       License for more details.

       You  should have received a copy of the GNU General Public License along with this program; if not, write
       to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

BUGS

       To     get      a      list      of      bugs      against      libguestfs,      use      this      link:
       https://bugzilla.redhat.com/buglist.cgi?component=libguestfs&product=Virtualization+Tools

       To       report       a       new       bug       against       libguestfs,      use      this      link:
       https://bugzilla.redhat.com/enter_bug.cgi?component=libguestfs&product=Virtualization+Tools

       When reporting a bug, please supply:

       •   The version of libguestfs.

       •   Where you got libguestfs (eg. which Linux distro, compiled from source, etc)

       •   Describe the bug accurately and give a way to reproduce it.

       •   Run libguestfs-test-tool(1) and paste the complete, unedited output into the bug report.

libguestfs-1.36.13                                 2018-01-25                                 virt-get-kernel(1)