This matters: If you accidentally open a live VM disk image writable
then you will cause irreversible disk corruption.
-By libguestfs 1.12 we intend to change the default the other way.
+In a future libguestfs 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>, I<guestmount --rw>, I<virt-rescue --rw>, or change
the configuration file C</etc/libguestfs-tools.conf> in order to get
command "/bin/echo 'foo bar'"
command "/bin/echo \'foo\'"
+=head2 ESCAPE SEQUENCES IN DOUBLE QUOTED ARGUMENTS
+
+In double-quoted arguments (only) use backslash to insert special
+characters:
+
+=over 4
+
+=item C<\a>
+
+Alert (bell) character.
+
+=item C<\b>
+
+Backspace character.
+
+=item C<\f>
+
+Form feed character.
+
+=item C<\n>
+
+Newline character.
+
+=item C<\r>
+
+Carriage return character.
+
+=item C<\t>
+
+Horizontal tab character.
+
+=item C<\v>
+
+Vertical tab character.
+
+=item C<\">
+
+A literal double quote character.
+
+=item C<\ooo>
+
+A character with octal value I<ooo>. There must be precisely 3 octal
+digits (unlike C).
+
+=item C<\xhh>
+
+A character with hex value I<hh>. There must be precisely 2 hex
+digits.
+
+In the current implementation C<\000> and C<\x00> cannot be used
+in strings.
+
+=item C<\\>
+
+A literal backslash character.
+
+=back
+
=head1 OPTIONAL ARGUMENTS
Some commands take optional arguments. These arguments appear in this
The C<edit> command uses C<$EDITOR> as the editor. If not
set, it uses C<vi>.
+=item FEBOOTSTRAP_KERNEL
+
+=item FEBOOTSTRAP_MODULES
+
+These two environment variables allow the kernel that libguestfs uses
+in the appliance to be selected. If C<$FEBOOTSTRAP_KERNEL> is not
+set, then the most recent host kernel is chosen. For more information
+about kernel selection, see L<febootstrap-supermin-helper(8)>. This
+feature is only available in febootstrap E<ge> 3.8.
+
+=item GUESTFISH_DISPLAY_IMAGE
+
+The C<display> command uses C<$GUESTFISH_DISPLAY_IMAGE> to
+display images. If not set, it uses L<display(1)>.
+
=item GUESTFISH_PID
Used with the I<--remote> option to specify the remote guestfish
L<virt-tar-in(1)>,
L<virt-tar-out(1)>,
L<virt-win-reg(1)>,
-L<hexedit(1)>.
+L<display(1)>,
+L<hexedit(1)>,
+L<febootstrap-supermin-helper(8)>.
=head1 AUTHORS