scp无密码及秘钥创建

当A机器使用scp向B机器同步文件时，可以通过创建秘钥对的形式来建立信任关系。

• ssh-****** -t rsa

   注意：
   	1.所有要输入的地方均可直接回车跳过
   		QUOTE: Generating public/private rsa key pair.
   		Enter file in which to save the key (/root/.ssh/id_rsa)::#回车 略过
   		Enter passphrase (empty for no passphrase):#回车略过
   		Enter same passphrase again:#回车略过
   		Your identification has been saved in /home/.username /.ssh/id_rsa.
   		Your public key has been saved in /home/.username /.ssh/id_rsa.pub. 
   		The key fingerprint is: 
   		38:25:c1:4d:5d:d3:89:bb:46:67:bf:52:af:c3:17:0c [email protected] 
   		Generating RSA keys: 
   		Key generation complete.
   	2.成功后会在你选择的文件中多出两个文件id_rsa，id_rsa.pub
  

• 将/root/.ssh/id_rsa.pub文件复制到B服务器的/root/.ssh/下并改名为authorized_keys

• scp -r （要复制的文件或文件夹） （目标服务器用户名）@目标服务器ip:目标地址

    -r递归