rsync 安全复制使用程序

CentOS最小化安装后，直接在客户端主机172.16.100.15上安装rsync程序，而服务端172.16.100.16未安装任何东西

# rsync /tmp/test.txt 172.16.100.16:/tmp
错误信息：
rsync: Failed to exec ssh: No such file or directory (2)
rsync error: error in IPC code (code 14) at pipe.c(84) [sender=3.0.6]
rsync: connection unexpectedly closed (0 bytes received so far) [sender]
rsync error: error in rsync protocol data stream (code 12) at io.c(600) [sender=3.0.6]

原因：
客户端172.16.100.15未安装openssh-clients程序
# yum install openssh-clients -y
# rsync /tmp/test.txt 172.16.100.16:/tmp
错误信息：
bash: rsync: command not found
rsync: connection unexpectedly closed (0 bytes received so far) [sender]
rsync error: error in rsync protocol data stream (code 12) at io.c(600) [sender=3.0.6]

原因：
服务器端172.16.100.16未安装rsync程序
# yum install rsync -y