使用Linux的crontab调用shell中的scp自动备份mysql数据

一、为了使用scp的时候不需要输入密码,采用ssh另一种用密钥对来验证的方式 。

1、使用ssh-keygen 命令生成密钥。生成过程中,除了输入密码外,其他都选择默认的值:回车即可。
引用:
  [root@xxx root]# ssh-keygen -t rsa
   Generating public/private rsa key pair.
   Enter file in which to save the key (/root/.ssh/id_rsa):
   Created directory '/root/.ssh'.
   Enter passphrase (empty for no passphrase):
   Enter same passphrase again:
   Your identification has been saved in /root/.ssh/id_rsa.
   Your public key has been saved in /root/.ssh/id_rsa.pub.
   The key fingerprint is:
   e0:f0:3b:d3:0a:3d:da:42:01:6a:61:2f:6c:a0:c6:e7 root@xxx
   [root@xxx root]#