Try:
http://netdial.caribe.net/~adrian2/programs/fdupes.html 

Or:
>/tmp/MD5SUMs
cd /path_1
find . -type f|sort|while read FI;do md5sum "$FI">>/tmp/MD5SUMs;done
cd /path_2
md5sum -c /tmp/MD5SUMs|grep -v 'OK$' 

OR:
cd /path_1
find . -type f|sort>/tmp/path_1.files
cd /path_2
find . -type f|sort>/tmp/path_2.files
diff /tmp/path_1.files /tmp/path_2.files
YMMV
ET 

PS: If you have any question you will get any answer.  :) 

 


joe@actionline.com writes: 

> 
> What command syntax can I use to locate all duplicate files (filenames) on
> my system?  Or, more specifically, within any specified directory on the
> system? 
> 
> Also, how can I tell which duplicates have identical contents and which
> duplicates have different content (or at least different file sizes)? 
> 
>  
> 
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