virt-get-kernel - Extract kernel and ramdisk from guests
virt-get-kernel [--options] -d domname
virt-get-kernel [--options] -a disk.img
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).
- --help
- ヘルプを表示します。
-
-a file
-
--add file
- 仮想マシンからディスクイメージの
file を追加します。
ディスクイメージの形式は自動的に検出されます。強制的に特定の形式を使用するには
--format
オプションを使用します。
-
-a URI
-
--add URI
- Add a remote disk. The URI format is compatible with
guestfish. See "ADDING REMOTE STORAGE" in
guestfish(1).
-
--blocksize 512
-
--blocksize 4096
- This parameter sets the sector size of the disk image added
with -a option and is ignored for libvirt guest added with
-d option. See also "guestfs_add_drive_opts" in
guestfs(3).
- --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
- libvirt
を使用していると、指定された
URI に接続します。
省略すると、デフォルトの
libvirt
ハイパーバイザーに接続します。
ゲストのブロックデバイスを直接指定していると（(
-a)）、libvirt
は何も使用されません。
-
-d guest
-
--domain guest
- 名前付きの libvirt
仮想マシンからすべてのディスクを追加します。
名前の代わりに仮想マシンの
UUID を使用できます。
- --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.
仮想マシンのディスクイメージが信頼できない
raw 形式である場合、
ディスク形式を指定するためにこのオプションを使用すべきです。
これにより、悪意のある仮想マシンにより起こり得る
セキュリティ問題を回避できます
(CVE-2010-3851)。
-
--key SELECTOR
- Specify a key for LUKS, to automatically open a LUKS device
when using the inspection. "ID" can be either the libguestfs
device name, or the UUID of the LUKS device.
-
--key "ID":key:KEY_STRING
- Use the specified "KEY_STRING" as
passphrase.
-
--key "ID":file:FILENAME
- Read the passphrase from FILENAME.
- --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.
If there are multiple encrypted devices then you may need to supply multiple
keys on stdin, one per line.
- --machine-readable
-
--machine-readable=format
- このオプションは、他のプログラムにより解析されるときに、よりマシンに易しい出力を作成するために使用されます。以下の
"マシン可読な出力"
参照。
-
-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
- デバッグ用の冗長なメッセージを有効にします。
- -V
- --version
- バージョン番号を表示して、終了します。
- --wrap
- Wrap error, warning, and informative messages. This is the
default when the output is a tty. If the output of the program is
redirected to a file, wrapping is disabled unless you use this
option.
- -x
- libguestfs API
呼び出しのトレースを有効にします。
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.
It is possible to specify a format string for controlling the output; see
"ADVANCED MACHINE READABLE OUTPUT" in
guestfs(3).
For other environment variables which affect all libguestfs programs, see
"ENVIRONMENT VARIABLES" in
guestfs(3).
このプログラムは、成功すると
0 を、エラーがあると 0
以外を返します。
guestfs(3),
guestfish(1),
guestmount(1),
virt-copy-out(1),
http://libguestfs.org/.
Richard W.M. Jones
http://people.redhat.com/~rjones/
Copyright (C) 2013-2020 Red Hat Inc.
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.