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.\" ========================================================================
.\"
.IX Title "virt-get-kernel 1"
.TH virt-get-kernel 1 "2021-03-31" "libguestfs-1.44.2" "Virtualization Support"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "名前"
.IX Header "名前"
virt-get-kernel \- Extract kernel and ramdisk from guests
.SH "書式"
.IX Header "書式"
.Vb 1
\& virt\-get\-kernel [\-\-options] \-d domname
\&
\& virt\-get\-kernel [\-\-options] \-a disk.img
.Ve
.SH "説明"
.IX Header "説明"
This option extracts the kernel and initramfs from a guest.
.PP
The format of the disk image is automatically detected unless you specify it
by using the \fI\-\-format\fR option.
.PP
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 \fBguestfish\fR\|(1).  To extract the entire \f(CW\*(C`/boot\*(C'\fR directory
of a guest, see \fBvirt\-copy\-out\fR\|(1).
.SH "オプション"
.IX Header "オプション"
.IP "\fB\-\-help\fR" 4
.IX Item "--help"
ヘルプを表示します。
.IP "\fB\-a\fR file" 4
.IX Item "-a file"
.PD 0
.IP "\fB\-\-add\fR file" 4
.IX Item "--add file"
.PD
仮想マシンからディスクイメージの \fIfile\fR を追加します。
.Sp
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 \fI\-\-format\fR オプションを使用します。
.IP "\fB\-a\fR \s-1URI\s0" 4
.IX Item "-a URI"
.PD 0
.IP "\fB\-\-add\fR \s-1URI\s0" 4
.IX Item "--add URI"
.PD
Add a remote disk.  The \s-1URI\s0 format is compatible with guestfish.  See
\&\*(L"\s-1ADDING REMOTE STORAGE\*(R"\s0 in \fBguestfish\fR\|(1).
.IP "\fB\-\-blocksize\fR \fB512\fR" 4
.IX Item "--blocksize 512"
.PD 0
.IP "\fB\-\-blocksize\fR \fB4096\fR" 4
.IX Item "--blocksize 4096"
.PD
This parameter sets the sector size of the disk image added with \fI\-a\fR
option and is ignored for libvirt guest added with \fI\-d\fR option.  See also
\&\*(L"guestfs_add_drive_opts\*(R" in \fBguestfs\fR\|(3).
.IP "\fB\-\-colors\fR" 4
.IX Item "--colors"
.PD 0
.IP "\fB\-\-colours\fR" 4
.IX Item "--colours"
.PD
Use \s-1ANSI\s0 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,
\&\s-1ANSI\s0 colour sequences are disabled unless you use this option.
.IP "\fB\-c\fR \s-1URI\s0" 4
.IX Item "-c URI"
.PD 0
.IP "\fB\-\-connect\fR \s-1URI\s0" 4
.IX Item "--connect URI"
.PD
libvirt を使用していると、指定された \fI\s-1URI\s0\fR 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。
.Sp
ゲストのブロックデバイスを直接指定していると（(\fI\-a\fR)）、libvirt は何も使用されません。
.IP "\fB\-d\fR guest" 4
.IX Item "-d guest"
.PD 0
.IP "\fB\-\-domain\fR guest" 4
.IX Item "--domain guest"
.PD
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 \s-1UUID\s0 を使用できます。
.IP "\fB\-\-echo\-keys\fR" 4
.IX Item "--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.
.IP "\fB\-\-format\fR raw|qcow2|.." 4
.IX Item "--format raw|qcow2|.."
.PD 0
.IP "\fB\-\-format\fR auto" 4
.IX Item "--format auto"
.PD
The default for the \fI\-a\fR option is to auto-detect the format of the disk
image.  Using this forces the disk format for the \fI\-a\fR option on the
command line.
.Sp
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 (\s-1CVE\-2010\-3851\s0)。
.IP "\fB\-\-key\fR \s-1SELECTOR\s0" 4
.IX Item "--key SELECTOR"
Specify a key for \s-1LUKS,\s0 to automatically open a \s-1LUKS\s0 device when using the
inspection.  \f(CW\*(C`ID\*(C'\fR can be either the libguestfs device name, or the \s-1UUID\s0 of
the \s-1LUKS\s0 device.
.RS 4
.ie n .IP "\fB\-\-key\fR ""ID"":key:KEY_STRING" 4
.el .IP "\fB\-\-key\fR \f(CWID\fR:key:KEY_STRING" 4
.IX Item "--key ID:key:KEY_STRING"
Use the specified \f(CW\*(C`KEY_STRING\*(C'\fR as passphrase.
.ie n .IP "\fB\-\-key\fR ""ID"":file:FILENAME" 4
.el .IP "\fB\-\-key\fR \f(CWID\fR:file:FILENAME" 4
.IX Item "--key ID:file:FILENAME"
Read the passphrase from \fI\s-1FILENAME\s0\fR.
.RE
.RS 4
.RE
.IP "\fB\-\-keys\-from\-stdin\fR" 4
.IX Item "--keys-from-stdin"
Read key or passphrase parameters from stdin.  The default is to try to read
passphrases from the user by opening \fI/dev/tty\fR.
.Sp
If there are multiple encrypted devices then you may need to supply multiple
keys on stdin, one per line.
.IP "\fB\-\-machine\-readable\fR" 4
.IX Item "--machine-readable"
.PD 0
.IP "\fB\-\-machine\-readable\fR=format" 4
.IX Item "--machine-readable=format"
.PD
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 \*(L"マシン可読な出力\*(R" 参照。
.IP "\fB\-o\fR directory" 4
.IX Item "-o directory"
.PD 0
.IP "\fB\-\-output\fR directory" 4
.IX Item "--output directory"
.PD
This option specifies the output directory where kernel and initramfs from
the guest are written.
.Sp
If not specified, the default output is the current directory.
.IP "\fB\-\-prefix\fR prefix" 4
.IX Item "--prefix prefix"
This option specifies a prefix for the extracted files.
.Sp
If a prefix is specified, then there will be a dash (\f(CW\*(C`\-\*(C'\fR) after the prefix
and before the rest of the file name; for example, a kernel in the guest
like \f(CW\*(C`vmlinuz\-3.19.0\-20\-generic\*(C'\fR is saved as
\&\f(CW\*(C`mydistro\-vmlinuz\-3.19.0\-20\-generic\*(C'\fR when the prefix is \f(CW\*(C`mydistro\*(C'\fR.
.Sp
See also \fI\-\-unversioned\-names\fR.
.IP "\fB\-q\fR" 4
.IX Item "-q"
.PD 0
.IP "\fB\-\-quiet\fR" 4
.IX Item "--quiet"
.PD
Don’t print ordinary progress messages.
.IP "\fB\-\-unversioned\-names\fR" 4
.IX Item "--unversioned-names"
This option affects the destination file name of extracted files.
.Sp
If enabled, files will be saved locally just with the base name; for
example, kernel and ramdisk in the guest like \f(CW\*(C`vmlinuz\-3.19.0\-20\-generic\*(C'\fR
and \f(CW\*(C`initrd.img\-3.19.0\-20\-generic\*(C'\fR are saved respectively as \f(CW\*(C`vmlinuz\*(C'\fR and
\&\f(CW\*(C`initrd.img\*(C'\fR.
.Sp
See also \fI\-\-prefix\fR.
.IP "\fB\-v\fR" 4
.IX Item "-v"
.PD 0
.IP "\fB\-\-verbose\fR" 4
.IX Item "--verbose"
.PD
デバッグ用の冗長なメッセージを有効にします。
.IP "\fB\-V\fR" 4
.IX Item "-V"
.PD 0
.IP "\fB\-\-version\fR" 4
.IX Item "--version"
.PD
バージョン番号を表示して、終了します。
.IP "\fB\-x\fR" 4
.IX Item "-x"
libguestfs \s-1API\s0 呼び出しのトレースを有効にします。
.SH "マシン可読な出力"
.IX Header "マシン可読な出力"
The \fI\-\-machine\-readable\fR option can be used to make the output more machine
friendly, which is useful when calling virt-get-kernel from other programs,
GUIs etc.
.PP
Use the option on its own to query the capabilities of the virt-get-kernel
binary.  Typical output looks like this:
.PP
.Vb 2
\& $ virt\-get\-kernel \-\-machine\-readable
\& virt\-get\-kernel
.Ve
.PP
A list of features is printed, one per line, and the program exits with
status 0.
.PP
It is possible to specify a format string for controlling the output; see
\&\*(L"\s-1ADVANCED MACHINE READABLE OUTPUT\*(R"\s0 in \fBguestfs\fR\|(3).
.SH "環境変数"
.IX Header "環境変数"
For other environment variables which affect all libguestfs programs, see
\&\*(L"\s-1ENVIRONMENT VARIABLES\*(R"\s0 in \fBguestfs\fR\|(3).
.SH "終了ステータス"
.IX Header "終了ステータス"
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。
.SH "関連項目"
.IX Header "関連項目"
\&\fBguestfs\fR\|(3), \fBguestfish\fR\|(1), \fBguestmount\fR\|(1), \fBvirt\-copy\-out\fR\|(1),
http://libguestfs.org/.
.SH "著者"
.IX Header "著者"
Richard W.M. Jones http://people.redhat.com/~rjones/
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (C) 2013\-2020 Red Hat Inc.
.SH "LICENSE"
.IX Header "LICENSE"
.SH "BUGS"
.IX Header "BUGS"
To get a list of bugs against libguestfs, use this link:
https://bugzilla.redhat.com/buglist.cgi?component=libguestfs&product=Virtualization+Tools
.PP
To report a new bug against libguestfs, use this link:
https://bugzilla.redhat.com/enter_bug.cgi?component=libguestfs&product=Virtualization+Tools
.PP
When reporting a bug, please supply:
.IP "\(bu" 4
The version of libguestfs.
.IP "\(bu" 4
Where you got libguestfs (eg. which Linux distro, compiled from source, etc)
.IP "\(bu" 4
Describe the bug accurately and give a way to reproduce it.
.IP "\(bu" 4
Run \fBlibguestfs\-test\-tool\fR\|(1) and paste the \fBcomplete, unedited\fR
output into the bug report.