为什么rsync加了交互式就报错，不加输入密码就可以

[root@master ~]# rsync -avz /etc/hosts rsync@172.16.165.195::backup/
Password:
sending incremental file list
sent 48 bytes received 20 bytes 27.20 bytes/sec
total size is 177 speedup is 2.60
[root@master ~]# rsync -avz /etc/hosts rsync@172.16.165.195::backup/ --password-file=/etc/rsync.password
@ERROR: auth failed on module backup
rsync error: error starting client-server protocol (code 5) at main.c(1649) [sender=3.1.2]
[root@master ~]# cat /etc/rsync.password
rsync:hello123

error starting client-server protocol
目标机上有没有rsync？先ssh上去看看目标机能不能运行rsync