guestfish
- guestfish -a disk.img
+ guestfish [--ro|--rw] -a disk.img
- guestfish -a disk.img -m dev[:mountpoint]
+ guestfish [--ro|--rw] -a disk.img -m dev[:mountpoint]
guestfish -d libvirt-domain
- guestfish -a disk.img -i
+ guestfish [--ro|--rw] -a disk.img -i
guestfish -d libvirt-domain -i
Edit C</boot/grub/grub.conf> interactively:
- guestfish --add disk.img \
+ guestfish --rw --add disk.img \
--mount /dev/vg_guest/lv_root \
--mount /dev/sda1:/boot \
edit /boot/grub/grub.conf
Another way to edit C</boot/grub/grub.conf> interactively is:
- guestfish -a disk.img -i edit /boot/grub/grub.conf
+ guestfish --rw -a disk.img -i edit /boot/grub/grub.conf
=head2 As a script interpreter
=head2 Remote control
- eval `guestfish --listen`
+ eval "`guestfish --listen`"
guestfish --remote add-ro disk.img
guestfish --remote run
guestfish --remote lvs
Displays general help on options.
-=item B<-h> | B<--cmd-help>
+=item B<-h>
+
+=item B<--cmd-help>
Lists all available guestfish commands.
-=item B<-h cmd> | B<--cmd-help cmd>
+=item B<-h cmd>
+
+=item B<--cmd-help cmd>
Displays detailed help on a single command C<cmd>.
-=item B<-a image> | B<--add image>
+=item B<-a image>
+
+=item B<--add image>
Add a block device or virtual machine image to the shell.
-=item B<-c URI> | B<--connect URI>
+The format of the disk image is auto-detected. To override this and
+force a particular format use the I<--format=..> option.
+
+Using this flag is mostly equivalent to using the C<add> command,
+with C<readonly:true> if the I<--ro> flag was given, and
+with C<format:...> if the I<--format:...> flag was given.
+
+=item B<-c URI>
+
+=item B<--connect URI>
When used in conjunction with the I<-d> option, this specifies
the libvirt URI to use. The default is to use the default libvirt
connection.
-=item B<-d libvirt-domain> | B<--domain libvirt-domain>
+=item B<--csh>
+
+If using the I<--listen> option and a csh-like shell, use this option.
+See section L</REMOTE CONTROL AND CSH> below.
+
+=item B<-d libvirt-domain>
+
+=item B<--domain libvirt-domain>
Add disks from the named libvirt domain. If the I<--ro> option is
also used, then any libvirt domain can be used. However in write
mode, only libvirt domains which are shut down can be named here.
-=item B<-D> | B<--no-dest-paths>
+Using this flag is mostly equivalent to using the C<add-domain> command,
+with C<readonly:true> if the I<--ro> flag was given, and
+with C<format:...> if the I<--format:...> flag was given.
+
+=item B<-D>
+
+=item B<--no-dest-paths>
Don't tab-complete paths on the guest filesystem. It is useful to be
able to hit the tab key to complete paths on the guest filesystem, but
worried about Tempest attacks and there is no one else in the room
you can specify this flag to see what you are typing.
-=item B<-f file> | B<--file file>
+=item B<-f file>
+
+=item B<--file file>
Read commands from C<file>. To write pure guestfish
scripts, use:
#!/usr/bin/guestfish -f
-=item B<-i> | B<--inspector>
+=item B<--format=raw|qcow2|..>
+
+=item B<--format>
+
+The default for the I<-a> option is to auto-detect the format of the
+disk image. Using this forces the disk format for I<-a> options which
+follow on the command line. Using I<--format> with no argument
+switches back to auto-detection for subsequent I<-a> options.
+
+For example:
+
+ guestfish --format=raw -a disk.img
+
+forces raw format (no auto-detection) for C<disk.img>.
+
+ guestfish --format=raw -a disk.img --format -a another.img
+
+forces raw format (no auto-detection) for C<disk.img> and reverts to
+auto-detection for C<another.img>.
+
+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). See also
+L</add-drive-opts>.
+
+=item B<-i>
+
+=item B<--inspector>
Using L<virt-inspector(1)> code, inspect the disks looking for
an operating system and mount filesystems as they would be
(for active domains, readonly), or specify the block device directly:
- guestfish -a /dev/Guests/MyGuest -i
+ guestfish --rw -a /dev/Guests/MyGuest -i
Note that the command line syntax changed slightly over older
versions of guestfish. You can still use the old syntax:
guestfish [--ro] -i libvirt-domain
+Using this flag is mostly equivalent to using the C<inspect-os>
+command and then using other commands to mount the filesystems that
+were found.
+
=item B<--keys-from-stdin>
Read key or passphrase parameters from stdin. The default is
Fork into the background and listen for remote commands. See section
L</REMOTE CONTROL GUESTFISH OVER A SOCKET> below.
-=item B<-m dev[:mountpoint]> | B<--mount dev[:mountpoint]>
+=item B<-m dev[:mountpoint]>
+
+=item B<--mount dev[:mountpoint]>
Mount the named partition or logical volume on the given mountpoint.
If any I<-m> or I<--mount> options are given, the guest is
automatically launched.
-If you don't know what filesystems a disk image contains, you
-can either run guestfish without this option, then list the partitions
-and LVs available (see L</list-partitions> and L</lvs> commands),
-or you can use the L<virt-list-filesystems(1)> program.
+If you don't know what filesystems a disk image contains, you can
+either run guestfish without this option, then list the partitions,
+filesystems and LVs available (see L</list-partitions>,
+L</list-filesystems> and L</lvs> commands), or you can use the
+L<virt-filesystems(1)> program.
+
+Using this flag is mostly equivalent to using the C<mount-options>
+command or the C<mount-ro> command if the I<--ro> flag was given.
+
+=item B<-n>
-=item B<-n> | B<--no-sync>
+=item B<--no-sync>
Disable autosync. This is enabled by default. See the discussion
of autosync in the L<guestfs(3)> manpage.
-=item B<-N type> | B<--new type> | B<-N help>
+=item B<-N type>
+
+=item B<--new type>
+
+=item B<-N help>
Prepare a fresh disk image formatted as "type". This is an
alternative to the I<-a> option: whereas I<-a> adds an existing disk,
Send remote commands to C<$GUESTFISH_PID> or C<pid>. See section
L</REMOTE CONTROL GUESTFISH OVER A SOCKET> below.
-=item B<-r> | B<--ro>
+=item B<-r>
-This changes the I<-a> and I<-m> options so that disks are added and
-mounts are done read-only (see L<guestfs(3)/guestfs_mount_ro>).
+=item B<--ro>
+
+This changes the I<-a>, I<-d> and I<-m> options so that disks are
+added and mounts are done read-only.
The option must always be used if the disk image or virtual machine
might be running, and is generally recommended in cases where you
don't need write access to the disk.
Note that prepared disk images created with I<-N> are not affected by
-the I<--ro> option.
+this option. Also commands like C<add> are not affected - you have to
+specify the C<readonly:true> option explicitly if you need it.
+
+See also L</OPENING DISKS FOR READ AND WRITE> below.
=item B<--selinux>
Enable SELinux support for the guest. See L<guestfs(3)/SELINUX>.
-=item B<-v> | B<--verbose>
+=item B<-v>
+
+=item B<--verbose>
Enable very verbose messages. This is particularly useful if you find
a bug.
-=item B<-V> | B<--version>
+=item B<-V>
+
+=item B<--version>
Display the guestfish / libguestfs version number and exit.
+=item B<-w>
+
+=item B<--rw>
+
+This option does nothing at the moment.
+See L</OPENING DISKS FOR READ AND WRITE> below.
+
=item B<-x>
Echo each command before executing it.
automatically, simply because guestfish can't perform the action you
asked for without doing this.
+=head1 OPENING DISKS FOR READ AND WRITE
+
+The guestfish (and L<guestmount(1)>) options I<--ro> and I<--rw>
+affect whether the other command line options I<-a>, I<-c>, I<-d>,
+I<-i> and I<-m> open disk images read-only or for writing.
+
+In libguestfs E<lt> 1.6.2, guestfish and guestmount defaulted to
+opening disk images supplied on the command line for write. To open a
+disk image read-only you have to do I<-a image --ro>.
+
+This matters: If you accidentally open a live VM disk image writable
+then you will cause irreversible disk corruption.
+
+By libguestfs 1.10 we intend to change the default the other way. Disk
+images will be opened read-only. You will have to either specify
+I<guestfish --rw> or change a configuration file in order to get write
+access for disk images specified by those other command line options.
+
+This version of guestfish has a I<--rw> option which does nothing (it
+is already the default). However it is highly recommended that you
+use this option to indicate that guestfish needs write access, and to
+prepare your scripts for the day when this option will be required for
+write access.
+
+B<Note:> This does I<not> affect commands like L</add> and L</mount>,
+or any other libguestfs program apart from guestfish and guestmount.
+
=head1 QUOTING
You can quote ordinary parameters using either single or double
command "/bin/echo 'foo bar'"
command "/bin/echo \'foo\'"
+=head1 OPTIONAL ARGUMENTS
+
+Some commands take optional arguments. These arguments appear in this
+documentation as C<[argname:..]>. You can use them as in these
+examples:
+
+ add-drive-opts filename
+
+ add-drive-opts filename readonly:true
+
+ add-drive-opts filename format:qcow2 readonly:false
+
+Each optional argument can appear at most once. All optional
+arguments must appear after the required ones.
+
=head1 NUMBERS
This section applies to all commands which can take integers
Start a guestfish server process using:
- eval `guestfish --listen`
+ eval "`guestfish --listen`"
and then send it commands by doing:
which is how the I<--remote> option knows where to send the commands.
You can have several guestfish listener processes running using:
- eval `guestfish --listen`
+ eval "`guestfish --listen`"
pid1=$GUESTFISH_PID
- eval `guestfish --listen`
+ eval "`guestfish --listen`"
pid2=$GUESTFISH_PID
...
guestfish --remote=$pid1 cmd
guestfish --remote=$pid2 cmd
+=head2 REMOTE CONTROL AND CSH
+
+When using csh-like shells (csh, tcsh etc) you have to add the
+I<--csh> option:
+
+ eval "`guestfish --listen --csh`"
+
=head2 REMOTE CONTROL DETAILS
Remote control happens over a Unix domain socket called
help
help cmd
-Without any parameter, this lists all commands. With a C<cmd>
-parameter, this displays detailed help for a command.
+Without any parameter, this provides general help.
+
+With a C<cmd> parameter, this displays detailed help for that command.
=head2 quit | exit
L<virt-cat(1)>,
L<virt-df(1)>,
L<virt-edit(1)>,
+L<virt-filesystems(1)>,
+L<virt-inspector(1)>,
L<virt-list-filesystems(1)>,
L<virt-list-partitions(1)>,
L<virt-ls(1)>,
git.annexia.org / libguestfs.git / blobdiff