thanks for the reply. It was a question for my project, that was checking my capability.I am learning perl from the scratch, a beginner. I used glob, but that gave me the array of files in the current directory, or the directory which I have passed to the glob function, it is not giving me the files in the sub directory. How do i do that?. i need to search for all the files in the disk, and need to push the files into an array,then take the files for processing. I need to avoid cyclic links, but didn't get the idea how to check the cyclic link? Also i need to find a way without recursion?. please guide me