rsync - Wikipedia

rsync (remote sync) is a utility for transferring and synchronizing files between a computer and a storage drive and across networked computers by comparing the modification times and sizes of files.[8] It is commonly found on Unix-like operating systems and is under the GPL-3.0-or-later license.[4][5][9][10][11][12] rsync is written in C as a single threaded application.[13] The rsync algorithm i