How to automatically Copying file to other destination as soon as it is created

It would be useful to supply more information about what it is you want to do, but here are some suggestions.
Your best bet would be a custom shell script and the use of the cron facility. Cron will run a script as many times as you ask it to, at regular intervals.
The content of the shell script, which is basically just a series of commands in an executable file, depends on whether you are copying the file to a filesystem destination or another system destination.
This is a sketchy answer, but the question was sparse on details. Hope this helps.

Well you got my attention.
Little less sketchy would be of interest
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Don't see how it can be copied at the instant of Creation unless it is created by a Script that creates it in all desired locations at the completion of creation
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obviously, if the directory where the file is to be intitially created is a known entity and is going to be empty at the time of the File Creation, the a script intiated by cron every second or what everm could do a cp file /X folowed by cp file /Y and finally followed by mv file /Z to clean up the initial directory preparatory to creation of the next file
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Let's see:
a) you can create a new (empty) file with the touch command.
b) you can create a new file with the cp command (the copy didn't exist beforehand).
c) you can create a new file with the mv command (the renamed file didn't exist beforehand).
d) you can create a new file with any of several text editors.
e) you can create a new file with any of several wordprocessors and page-setup applications.

Each has it's own means of creating new files.

You would need a daemon to watch for the creation of new files and make copies of said files elsewhere. The daemon would need a set of rules to guide it: create new files if created by certain applications, but ignore new files resulting from package installation.

The problem as stated is much too broad for an easy answer.

the cleaner way would be to use inotify
http://www-128.ibm.com/developerwork...l-inotify.html

Does INOTIFY or dnotify take lots of resources

Hi,

Why not change the original program to place the file(s) in the correct location in the first place?
Like others have already stated: the info given is to sparse to give a good answer.