anyone heard of jhead?

I need to install this for photogallery operations.

http://www.sentex.net/~mwandel/jhead/index.html

I downloaded a txt file then chmoded it so I could execute it but I don't know how to actually execute it or what else needs to be done to install it (ie which directory do I restart after etc).

Anyone using this?

 

 

 

 

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