| 1 | <?xml version="1.0" encoding="UTF-8"?>
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| 2 | <!--
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| 3 | manpage, user manual, usage: vboximg-mount
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| 4 |
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| 5 | Copyright (C) 2006-2020 Oracle Corporation
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| 6 |
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| 7 | This file is part of VirtualBox Open Source Edition (OSE), as
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| 8 | available from http://www.virtualbox.org. This file is free software;
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| 9 | you can redistribute it and/or modify it under the terms of the GNU
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| 10 | General Public License (GPL) as published by the Free Software
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| 11 | Foundation, in version 2 as it comes in the "COPYING" file of the
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| 12 | VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 13 | hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 14 | -->
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| 15 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 16 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"[
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| 17 | <!ENTITY % all.entities SYSTEM "all-entities.ent">
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| 18 | %all.entities;
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| 19 | ]>
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| 20 | <refentry id="man_vboximg-mount" lang="en">
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| 21 | <refentryinfo>
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| 22 | <pubdate>November 2019</pubdate>
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| 23 | <title>vboximg-mount</title>
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| 24 | </refentryinfo>
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| 25 |
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| 26 | <refmeta>
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| 27 | <refentrytitle>vboximg-mount</refentrytitle>
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| 28 | <manvolnum>1</manvolnum>
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| 29 | </refmeta>
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| 30 |
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| 31 | <refnamediv>
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| 32 | <refname>vboximg-mount</refname>
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| 33 | <refpurpose>FUSE mount a virtual disk image for Mac OS and Linux hosts</refpurpose>
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| 34 | <refclass>Oracle VM VirtualBox</refclass>
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| 35 | </refnamediv>
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| 36 |
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| 37 | <refsynopsisdiv>
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| 38 | <cmdsynopsis id="synopsis-vboximg-mount-help">
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| 39 | <!-- The 'id' is mandatory and must start with 'synopsis-'. -->
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| 40 | <command>vboximg-mount</command>
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| 41 | <group choice="req">
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| 42 | <arg choice="plain">-?</arg>
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| 43 | <arg choice="plain">-h</arg>
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| 44 | <arg choice="plain">--help</arg>
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| 45 | </group>
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| 46 | </cmdsynopsis>
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| 47 |
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| 48 | <cmdsynopsis id="synopsis-vboximg-mount-mount">
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| 49 | <command>vboximg-mount</command>
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| 50 | <arg choice="req">--image=<replaceable>image-UUID</replaceable></arg>
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| 51 | <arg>--guest-filesystem</arg>
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| 52 | <arg>-o=<replaceable>FUSE-option</replaceable>[,<replaceable>FUSE-option</replaceable>]</arg>
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| 53 | <arg>--root</arg>
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| 54 | <arg>--rw</arg>
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| 55 | <arg choice="req"><replaceable>mountpoint</replaceable></arg>
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| 56 | </cmdsynopsis>
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| 57 |
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| 58 | <cmdsynopsis id="synopsis-vboximg-mount-list">
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| 59 | <command>vboximg-mount</command>
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| 60 | <arg choice="req">--list</arg>
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| 61 | <arg>--image=<replaceable>image-UUID</replaceable></arg>
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| 62 | <arg>--guest-filesystem</arg>
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| 63 | <arg>--verbose</arg>
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| 64 | <arg>--vm=<replaceable>vm-UUID</replaceable></arg>
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| 65 | <arg>--wide</arg>
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| 66 | </cmdsynopsis>
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| 67 | </refsynopsisdiv>
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| 68 |
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| 69 | <refsect1 id="vboximg-mount-intro">
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| 70 | <title>Description</title>
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| 71 | <para>
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| 72 | The <command>vboximg-mount</command> command enables you to make
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| 73 | &product-name; disk images available to a Mac OS or Linux host
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| 74 | operating system (OS) for privileged or non-priviliged access. You
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| 75 | can mount any version of the disk from its available history of
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| 76 | snapshots. Use this command to mount, view, and optionally modify
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| 77 | the contents of an &product-name; virtual disk image, and you can
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| 78 | also use this command to view information about registered virtual
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| 79 | machines (VMs).
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| 80 | </para>
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| 81 | <para>
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| 82 | This command uses the Filesystem in Userspace (FUSE) technology to
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| 83 | provide raw access to an &product-name; virtual disk image.
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| 84 | </para>
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| 85 | <para>
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| 86 | When you use the <option>--image</option> option to specify a base
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| 87 | image identifier, only the base image is mounted. Any related
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| 88 | snapshots are disregarded. Alternatively, if you use the
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| 89 | <option>--image</option> option to specify a snapshot, the state
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| 90 | of the FUSE-mounted virtual disk is synthesized from the implied
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| 91 | chain of snapshots, including the base image.
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| 92 | </para>
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| 93 | <para>
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| 94 | The <command>vboximg-mount</command> command includes experimental
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| 95 | read-only access to file systems inside a VM disk image. This
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| 96 | feature enables you to extract some files from the VM disk image
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| 97 | without starting the VM and without requiring third-party file
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| 98 | system drivers on the host system. &product-name; supports the
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| 99 | FAT, NTFS, <filename>ext2</filename>, <filename>ext3</filename>,
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| 100 | and <filename>ext4</filename> file systems.
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| 101 | </para>
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| 102 | <para>
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| 103 | The virtual disk is exposed as a device node within a FUSE-based
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| 104 | file system that overlays the specified mount point.
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| 105 | </para>
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| 106 | <para>
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| 107 | The FUSE file system includes a directory that contains a number
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| 108 | of files. The file system can also contain a directory that
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| 109 | includes a symbolic link that has the same base name (see the
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| 110 | <command>basename</command>(1) man page) as the virtual disk base
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| 111 | image and points to the location of the virtual disk base image.
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| 112 | The directory can be of the following types:
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| 113 | </para>
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| 114 | <itemizedlist>
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| 115 | <listitem><para>
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| 116 | <filename>vhdd</filename> provides access to the raw disk
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| 117 | image data as a flat image
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| 118 | </para></listitem>
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| 119 | <listitem><para>
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| 120 | <literal>vol<replaceable>ID</replaceable></literal> provides
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| 121 | access to an individual volume on the specified disk image
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| 122 | </para></listitem>
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| 123 | <listitem><para>
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| 124 | <literal>fs<replaceable>ID</replaceable></literal> provides
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| 125 | access to a supported file system without requiring a host
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| 126 | file system driver
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| 127 | </para></listitem>
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| 128 | </itemizedlist>
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| 129 | <refsect2 id="vboximg-mount-help">
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| 130 | <title>General Command Options</title>
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| 131 | <remark role="help-copy-synopsis"/>
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| 132 | <para>
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| 133 | Use the following options to obtain information about the
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| 134 | <command>vboximg-mount</command> command and its options.
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| 135 | </para>
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| 136 | <variablelist>
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| 137 | <varlistentry>
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| 138 | <term><option>--help</option>, <option>--h</option>, or<option>--?</option></term>
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| 139 | <listitem><para>
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| 140 | Shows usage information.
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| 141 | </para></listitem>
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| 142 | </varlistentry>
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| 143 | </variablelist>
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| 144 | </refsect2>
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| 145 | <refsect2 id="vboximg-mount-mount">
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| 146 | <title>Mounting an &product-name; Disk Image</title>
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| 147 | <remark role="help-copy-synopsis"/>
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| 148 | <para>
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| 149 | Use the <command>vboximg-mount</command> command to mount an
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| 150 | &product-name; virtual disk image on a Mac OS or Linux host
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| 151 | system. When mounted, you can view the contents of the disk
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| 152 | image or modify the contents of the disk image.
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| 153 | </para>
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| 154 | <para>
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| 155 | You can use the <command>vboximg-mount</command> command to
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| 156 | restrict FUSE-based access to a subsection of the virtual disk.
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| 157 | </para>
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| 158 | <variablelist>
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| 159 | <varlistentry>
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| 160 | <term><option>--image=<replaceable>disk-image</replaceable></option></term>
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| 161 | <listitem><para>
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| 162 | Specifies the Universally Unique Identifier (UUID), name,
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| 163 | or path of the &product-name; disk image.
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| 164 | </para><para>
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| 165 | The short form of the <option>--image</option> option is
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| 166 | <option>-i</option>.
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| 167 | </para></listitem>
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| 168 | </varlistentry>
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| 169 | <varlistentry>
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| 170 | <term><option>--guest-filesystem</option></term>
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| 171 | <listitem><para>
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| 172 | Enables experimental read-only support for guest file
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| 173 | systems. When you specify this option, all known file
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| 174 | systems are made available to access.
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| 175 | </para><para>
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| 176 | The short form of the <option>--guest-filesystem</option>
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| 177 | option is <option>-g</option>.
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| 178 | </para></listitem>
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| 179 | </varlistentry>
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| 180 | <varlistentry>
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| 181 | <term><option>-o=<replaceable>FUSE-option</replaceable>[,<replaceable>FUSE-option</replaceable>...]</option></term>
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| 182 | <listitem><para>
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| 183 | Specifies FUSE mount options.
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| 184 | </para><para>
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| 185 | The <command>vboximg-mount</command> command enables you
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| 186 | to use the FUSE mount options that are described in the
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| 187 | <command>mount.fuse</command>(8) man page.
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| 188 | </para></listitem>
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| 189 | </varlistentry>
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| 190 | <varlistentry>
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| 191 | <term><option>--root</option></term>
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| 192 | <listitem><para>
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| 193 | Overrides the security measure that restricts file access
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| 194 | to the file system owner by also granting file access to
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| 195 | the <literal>root</literal> user.
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| 196 | </para><para>
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| 197 | Same as the <option>-o allow_root</option> option. See the
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| 198 | <option>-o</option> option description.
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| 199 | </para><para>
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| 200 | This option is incompatible with the <option>-o
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| 201 | allow_other</option> option.
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| 202 | </para></listitem>
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| 203 | </varlistentry>
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| 204 | <varlistentry>
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| 205 | <term><option>--rw</option></term>
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| 206 | <listitem><para>
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| 207 | Mounts the specified image as read-write, which is
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| 208 | required if you want to modify its contents. By default,
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| 209 | images are mounted as read-only.
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| 210 | </para></listitem>
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| 211 | </varlistentry>
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| 212 | <varlistentry>
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| 213 | <term><replaceable>mount-point</replaceable></term>
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| 214 | <listitem><para>
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| 215 | Specifies the path name of a directory on which to mount
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| 216 | the &product-name; disk image.
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| 217 | </para></listitem>
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| 218 | </varlistentry>
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| 219 | </variablelist>
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| 220 | </refsect2>
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| 221 | <refsect2 id="vboximg-mount-list">
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| 222 | <title>Viewing &product-name; Disk Image Information</title>
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| 223 | <remark role="help-copy-synopsis"/>
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| 224 | <para>
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| 225 | Use the <command>vboximg-mount</command> command to view
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| 226 | information about registered VMs or an &product-name; virtual
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| 227 | disk image.
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| 228 | </para>
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| 229 | <variablelist>
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| 230 | <varlistentry>
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| 231 | <term><option>--image=<replaceable>disk-image</replaceable></option></term>
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| 232 | <listitem><para>
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| 233 | Specifies the UUID, name, or path of the &product-name;
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| 234 | disk image.
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| 235 | </para><para>
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| 236 | The short form of the <option>--image</option> option is
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| 237 | <option>-i</option>.
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| 238 | </para></listitem>
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| 239 | </varlistentry>
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| 240 | <varlistentry>
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| 241 | <term><option>--guest-filesystem</option></term>
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| 242 | <listitem><para>
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| 243 | Enables experimental read-only support for guest file
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| 244 | systems. When you specify this option, all known file
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| 245 | systems are made available to access.
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| 246 | </para><para>
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| 247 | The short form of the <option>--guest-filesystem</option>
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| 248 | option is <option>-g</option>.
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| 249 | </para></listitem>
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| 250 | </varlistentry>
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| 251 | <varlistentry>
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| 252 | <term><option>--list</option></term>
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| 253 | <listitem><para>
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| 254 | Shows information about the disks that are associated with
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| 255 | the registered VMs. If you specify a disk image, this
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| 256 | option shows information about the partitions of the
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| 257 | specified image.
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| 258 | </para><para>
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| 259 | When you specify the <option>--verbose</option> option,
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| 260 | the output includes detailed information about the VMs and
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| 261 | media, including snapshot images and file paths.
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| 262 | </para><para>
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| 263 | The short form of the <option>--list</option> option is
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| 264 | <option>-l</option>.
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| 265 | </para></listitem>
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| 266 | </varlistentry>
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| 267 | <varlistentry>
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| 268 | <term><option>--verbose</option></term>
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| 269 | <listitem><para>
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| 270 | Shows or logs detailed information.
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| 271 | </para><para>
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| 272 | The short form of the <option>--verbose</option> option is
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| 273 | <option>-v</option>.
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| 274 | </para></listitem>
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| 275 | </varlistentry>
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| 276 | <varlistentry>
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| 277 | <term><option>--vm=<replaceable>vm-UUID</replaceable></option></term>
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| 278 | <listitem><para>
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| 279 | Outputs information about the VM that is associated with
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| 280 | the specified UUID.
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| 281 | </para></listitem>
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| 282 | </varlistentry>
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| 283 | <varlistentry>
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| 284 | <term><option>--wide</option></term>
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| 285 | <listitem><para>
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| 286 | Outputs information in a wide format. This output includes
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| 287 | the lock state information of running VMs. For VMs that
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| 288 | are not running, the state is <literal>created</literal>.
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| 289 | </para><para>
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| 290 | The wide output uses a tree-like structure in the VM
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| 291 | column to show the relationship between a VM base image
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| 292 | and its snapshots.
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| 293 | </para></listitem>
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| 294 | </varlistentry>
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| 295 | </variablelist>
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| 296 | </refsect2>
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| 297 | </refsect1>
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| 298 |
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| 299 | <refsect1>
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| 300 | <title>Examples</title>
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| 301 | <remark role="help-scope" condition="MOUNT-MOUNT,MOUNT-LIST"/>
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| 302 | <para>
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| 303 | The following example shows how to mount a virtual disk image on
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| 304 | the host operating system (OS).
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| 305 | </para>
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| 306 | <screen>$ mkdir fuse_mount_point
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| 307 | $ vboximg-mount --image=b490e578-08be-4f7d-98e9-4c0ef0952377 fuse_mount_point
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| 308 | $ ls fuse_mount_point
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| 309 | ubu.vdi[32256:2053029880] vhdd
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| 310 | $ sudo mount fuse_mount_point/vhdd /mnt</screen>
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| 311 | <para>
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| 312 | The <command>mkdir</command> command creates a mount point called
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| 313 | <filename>fuse_mount_point</filename> on the host OS. The
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| 314 | <command>vboximg-mount</command> command is then used to mount the
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| 315 | specified disk image on the <filename>fuse_mount_point</filename>
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| 316 | mount point. The mount includes all snapshots for the disk image.
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| 317 | </para>
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| 318 | <para>
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| 319 | The <command>ls</command> command shows the contents of
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| 320 | <filename>fuse_mount_point</filename>. The
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| 321 | <command>mount</command> command is then used to mount the
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| 322 | FUSE-mounted device node, <command>vhdd</command>, on the
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| 323 | <filename>/mnt</filename> mount point. The <command>vhdd</command>
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| 324 | device node represents the virtual disk image.
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| 325 | </para>
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| 326 | <para>
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| 327 | The following example shows how to make the known file systems of
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| 328 | the <literal>b490e578-08be-4f7d-98e9-4c0ef0952377</literal> disk
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| 329 | image accessible when the image is mounted on the
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| 330 | <filename>fuse_mount_point</filename> mount point:
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| 331 | </para>
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| 332 | <screen>$ vboximg-mount --image=b490e578-08be-4f7d-98e9-4c0ef0952377 \
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| 333 | --guest-filesystem fuse_mount_point
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| 334 | </screen>
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| 335 | <para>
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| 336 | The following command outputs detailed information about all
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| 337 | registered VMs and their snapshots:
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| 338 | </para>
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| 339 | <screen>$ vboximg-mount --list --verbose</screen>
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| 340 | <para>
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| 341 | The following command shows an excerpt of the list output in wide
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| 342 | format.
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| 343 | </para>
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| 344 | <screen>$ vboximg-mount --list --wide
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| 345 |
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| 346 | VM Image Size Type State UUID (hierarchy)
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| 347 | ------------------------------------------ ------------------------------------
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| 348 | Proxy 0833f5bc-6304-42e1-b799-cdc81c576c60
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| 349 | |
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| 350 | +- Proxy.vdi 4.8G VDI rlock d5f84afb-0794-4952-ab71-6bbcbee07737
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| 351 | | +- <snapshot> 12.3G VDI rlock dffc67aa-3023-477f-8033-b27e3daf4f54
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| 352 | | +- <snapshot> 8.8G VDI rlock 3b2755bd-5f2a-4171-98fe-647d510b6274
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| 353 | | +- <snapshot> 14.6G VDI rlock e2ccdb5f-49e8-4123-8623-c61f363cc5cf
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| 354 | | +- <snapshot> 7.4G VDI wlock 3c1e6794-9091-4be3-9e80-11aba40c2649
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| 355 |
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| 356 | ------------------------------------------ ------------------------------------
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| 357 | Oracle Linux 7 5365ab5f-470d-44c0-9863-dad532ee5905
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| 358 | |
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| 359 | +- Oracle Linux 7.vdi 7.0G VDI created 96d2e92e-0d4e-46ab-a0f1-008fdbf997e7
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| 360 | | +- <snapshot> 15.9G VDI created f9cc866a-9166-42e9-a503-bbfe9b7312e8
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| 361 | |
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| 362 | +- kernel.vdi 11.1G VDI created 79a370bd-0c4f-480a-30bb-10cdea68423f
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| 363 | </screen>
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| 364 | <para>
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| 365 | The output shows that the Proxy VM is running the fourth snapshot
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| 366 | of the <command>Proxy.vdi</command> virtual disk image. The
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| 367 | running state is indicated by the <command>wlock</command> value
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| 368 | in the State column.
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| 369 | </para>
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| 370 | <para>
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| 371 | The Oracle Linux 7 VM is not running. It has two images:
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| 372 | <command>Oracle Linux 7.vdi</command> and
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| 373 | <command>kernel.vdi</command>. The <command>Oracle Linux
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| 374 | 7.vdi</command> image has a snapshot.
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| 375 | </para>
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| 376 | <para>
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| 377 | The following command shows information about the VM with the
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| 378 | specified UUID:
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| 379 | </para>
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| 380 | <screen>
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| 381 | $ vboximg-mount --list --vm=b1d5563b-2a5b-4013-89f1-26c81d6bbfa0
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| 382 | -----------------------------------------------------------------
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| 383 | VM: ubu
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| 384 | UUID: b1d5563b-2a5b-4013-89f1-26c81d6bbfa0
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| 385 |
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| 386 | Image: ubu.vdi
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| 387 | UUID: b490e578-08be-4f7d-98e9-4c0ef0952377
|
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| 388 |
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| 389 | Snapshot: 35afe1e0-0a51-44f3-a228-caf172f3306f
|
|---|
| 390 | Size: 12.1G
|
|---|
| 391 |
|
|---|
| 392 | Snapshot: 874279c1-4425-4282-ada8-a9c07c00bbf9
|
|---|
| 393 | Size: 13.6G
|
|---|
| 394 |
|
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| 395 | Image: kernel.vdi
|
|---|
| 396 | UUID: 79a370bd-6eb7-4dbf-8bc6-d29118f127e0</screen>
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| 397 | </refsect1>
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| 398 | </refentry>
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