how can i change the date of an existing file

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# 1  
Old 11-22-2007
how can i change the date of an existing file

Plz suggest me how can i change the date of a file.

Suppose my file has been created in some date and i want to give it present date.

How can i do this????
# 2  
Old 11-22-2007
man touch


touch filename
# 3  
Old 11-22-2007

thanks porter......
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