[root@xxx bin]# ./rrdtool
RRDtool  1 . 2 . 19   Copyright  1997 - 2007  by Tobias Oetiker <tobi@oetiker.ch>;
               Compiled Mar  21   2007   09 : 08 : 07 

Usage: rrdtool [options] command command_options

Valid commands: create, update, updatev, graph, dump, restore,
                last, lastupdate, first, info, fetch, tune,
 resize, xport

RRDtool is distributed under the Terms of the GNU General
Public License Version  2 . (www.gnu.org/copyleft/gpl.html)

For more information read the RRD manpages

[root@xxx bin]# ./rrdtool dump
RRDtool  1 . 2 . 19   Copyright  1997 - 2007  by Tobias Oetiker <tobi@oetiker.ch>;
               Compiled Mar  21   2007   09 : 08 : 07 

Usage: rrdtool [options] command command_options

* dump - dump an RRD to XML

        rrdtool dump filename.rrd >filename.xml

RRDtool is distributed under the Terms of the GNU General
Public License Version  2 . (www.gnu.org/copyleft/gpl.html)

For more information read the RRD manpages

[root@xxx bin]# ./rrdtool restore
RRDtool  1 . 2 . 19   Copyright  1997 - 2007  by Tobias Oetiker <tobi@oetiker.ch>;
               Compiled Mar  21   2007   09 : 08 : 07 

Usage: rrdtool [options] command command_options

* restore - restore an RRD file from its XML form

        rrdtool restore [--range-check|-r] [--force-overwrite|-f] filename.xml filename.rrd

RRDtool is distributed under the Terms of the GNU General
Public License Version  2 . (www.gnu.org/copyleft/gpl.html)

For more information read the RRD manpages