语法说明

Local:

rsync [OPTION...] SRC... [DEST]

Access via remote shell:
Pull:

rsync [OPTION...] [USER@]HOST:SRC... [DEST]

Push:

rsync [OPTION...] SRC... [USER@]HOST:DEST

Access via rsync daemon:
Pull:

rsync [OPTION...] [USER@]HOST::SRC... [DEST]
rsync [OPTION...] rsync://[USER@]HOST[:PORT]/SRC... [DEST]

Push:

rsync [OPTION...] SRC... [USER@]HOST::DEST
rsync [OPTION...] SRC... rsync://[USER@]HOST[:PORT]/DEST)

rsync -acrvtP -e "ssh -i ./mysshkey" ../testa/ root@IP:/root/test