Replace duplicates with symlinks

[Alan Milnes]

I've just invested in a 1Tb external HDD and am consolidating various 
backups onto it.  What I'd like to do is identify and remove all 
duplicate files on it but replace them with symlinks to the original.

I've googled and found fslint and fdupes, the latter looks promising as 
you can export the findings to a text file - it produces a line like this:-

# rm thisisaduplicate.txt

however it doesn't tell me where the original is.

Is there an app / utility / script that does this? Even a tutorial that 
would help me write my own script?

Thanks

Alan