быстрый, универсальный, удаленный (и локальный) инструмент для копирования файлов (a fast, versatile, remote (and local) file-copying tool)
STARTING AN RSYNC DAEMON TO ACCEPT CONNECTIONS
In order to connect to an rsync daemon, the remote system needs
to have a daemon already running (or it needs to have configured
something like inetd to spawn an rsync daemon for incoming
connections on a particular port). For full information on how
to start a daemon that will handling incoming socket connections,
see the rsyncd.conf(5) man page -- that is the config file for
the daemon, and it contains the full details for how to run the
daemon (including stand-alone and inetd configurations).
If you're using one of the remote-shell transports for the
transfer, there is no need to manually start an rsync daemon.