Basic syntax of rsync command
# rsync options source destination
Some common options used with rsync commands
-v : verbose
-r : copies data recursively (but don’t preserve timestamps and permission while transferring data
-a : archive mode, archive mode allows copying files recursively and it also preserves symbolic links, file permissions, user & group ownerships and timestamps
-z : compress file data
-h : human-readable, output numbers in a human-readable format
additional example: https://www.tecmint.com/rsync-local-remote-file-synchronization-commands/