In this post I wanna give a clue how to use well known and famous Open Source rsync program for directories synchronization. rsync is a widely-used utility to keep copies of a file on two computer systems are same. It is commonly found on Unix-like systems and functions as both a file synchronization and file transfer program. The rsync algorithm, a type of delta encoding, is used to minimize network usage. Zlib may be used for additional compression, and SSH or stunnel can be used for data security.