Host centdev  
			        HostName 192.168.12.22  
			        Port    2345  
			        User    root  
			Host fc5dev  
			        HostName 192.168.12.11  
			        Port   4567  
			        User    btbt  
			Host svn  
			        HostName 192.168.12.22
			        User    root  

			Host svn2  
			        HostName 192.168.12.232  
			        User    root  s
			        PreferredAuthentications publickey  
			        PubkeyAuthentication yes  
			        IdentityFile ~/.ssh/id_rsa

			=======config target machine======
			/etc/ssh/sshd_config
			RSAAuthentication yes
			PubkeyAuthentication yes
			AuthorizedKeysFile	%h/.ssh/pub_keys

			// OR
			AuthorizedKeysFile	~/.ssh/pub_keys

			//chmod 700 .ssh 

		scp -r root@cnwbzp1048.cn.dst.ibm.com:/home/ucdagent/ucd_cli/* ./