+=item $output = $h->sh ($command);
+
+This call runs a command from the guest filesystem via the
+guest's C</bin/sh>.
+
+This is like C<$h-E<gt>command>, but passes the command to:
+
+ /bin/sh -c "command"
+
+Depending on the guest's shell, this usually results in
+wildcards being expanded, shell expressions being interpolated
+and so on.
+
+All the provisos about C<$h-E<gt>command> apply to this call.
+
+=item @lines = $h->sh_lines ($command);
+
+This is the same as C<$h-E<gt>sh>, but splits the result
+into a list of lines.
+
+See also: C<$h-E<gt>command_lines>
+