UNIX for Advanced & Expert Users

Consider i have 2 directories a1 and a2.
under a1, i have below files

Code:

test1
test2
test3.

Under a2,i have below files.

Code:

test1
test2
test3
test4
test5

My requirement is i will pass the directory names(2 parameters) and directory in which files needs to be removed.(3rd parameter)
a)first scenario is, we need to remove the test1 test2 and test3 files from a2 since those are in a1(just checking the file name)
b)second scenario,Remove test1 test2 and test3 from a2 ,if the actual contents are also same.

Thanks

why you are not using code tags ?

I thought that i din't post any script .Thats why i haven't used.Now i understand i need to use. Thanks

Remove test1 test2 and test3 from a2 ,if the actual contents are also same

Same in a2 itself ?

means..

test1 = test2 = test3 ?

No.Remove test1,test2 and test3 from a2 if their contents are similar to test1,test2 and test3 in a1.
I hope u get the requirement.

a)

Code:

 
cd a1
for i in *; do [ -f a2/$i ] && echo "rm ../b/$i" ; done

b)

Code:

 
 cd a1
 for i in *; do [ -f a2/$i ] && diff $i a2/$i > /dev/null && echo "rm a2/$i" ; done

can you explain this part:

Code:

"rm ../b/$i"

what does that /b/ stahbd for?

Thanks