linux系统间通过cron和ssh实现数据的自动定时传输

第一步：ssh的设置

把你的本地主机用户的ssh公匙文件写入到远程主机用户的~/.ssh/authorized_keys文件中,具体方法是假设本地主机为daqi3@10.129.1.1,远程主机daqi2@10.129.1.1

一：先屏蔽scp命令调用时出现的口令提示，在daqi3@10.129.1.1主机里的用户

运行 ssh-keygen -t rsa
结果如下
Generating public/private rsa key pair.

Enter file in which to save the key (/home/.username/ssh/id_rsa):#回车

Enter passphrase (empty for no passphrase):#回车

Enter same passphrase again:#回车

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 username@localhost

Generating RSA keys:

Key generation complete.
会在用户目录~/.ssh/产生两个文件，id_rsa，id_rsa.pub

二：把id_rsa.pub文件拷贝到daqi2@10.129.1.1主机的用户目录下 然后再运行如下命令

在daqi2@10.129.1.1目录下，运行cat id_rsa.pub >~/.ssh/authorized_keys
它将在daqi2@10.129.1.1的/.ssh/目录下面生成authorized_keys这个文件
完成以后，在命令提示符下面输入SCP命令测试一下
如：scp /opt/dbback/data/aa.dmp.zip root@10.10.29.1:/opt/dbback/
手工测试的时候，如果不出现提示要输入密码，这说明成功了。