Find all files/directories under '/usr/share/data' directory tree that match the posix extended regex ".*/20140624.*" in their paths and save the list to '/home/user/txt-files/data-as-of-20140624.txt'
find /usr/share/data -regextype posix-extended -regex ".*/20140624.*" -fprint /home/user/txt-files/data-as-of-20140624.txt