touch - cannot use options "backward"

[Laurent Charpentier]

Hi,

Apparently the "touch" command has a --backward option to
modify the time of a file by a number of seconds.
http://www.linuxforum.com/man/touch.1.php

However, I tried several version of touch (coreutils): 4.5.3, 4.5.8, 5.0, 5.2.1
and this option is not available.

How can I get this option?
Or is there another program to change the time stamp of a file
(like 1 hour backward).

Thanks

Laurent


                
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