How to write this script in unix?

Question

How can I write a script for finding the files created by a particular user ID in some locations and tar those files in the same location?

Answer 1

Example creating a tarball of all files belonging to the root user anywhere beneath the current directory:

find . -uid 0 -print0|xargs -0 tar cf files-of-root-user.tar

You would replace -uid 0 with the id of the user you want to create the tar for.