File difference module similar to the Linux command "comm"

[Vino]

Hi All,

   May i know whether there is any module similar to  the Linux 
command "comm" (finding difference between 2 files), if present 
can you please guide me through link to the page nor do let me 
know  if there is any other solution.

Eg
File1
list1
list2
list3
lsit5

File2
list1
list3
lsit6

File1 : difference: list6
File2 : difference: list2,list5

From,
Vino