linux 内网scp 无密码传输

实现目标机器A无密码自动拷贝机器B上的mysql备份文件：

首先在AB机器上生产密钥，运行：

ssh-keygen -t rsa

输入ssh-keygen -t rsa之后全部默认回车，这样就会在/root/.ssh下生成密钥文件

建信任关系：

拷贝A的 id_rsa.pub到机器B的authorized_keys文件中

　自动备份及传输脚本

#!/bin/bash
# This is a ShellScript For Auto DB Backup and Delete old Backup

#database name
name=t_base
dir=/alidata/backup/t_v3/$name/
mkdir -p $dir
#backup file time
time=_`date +%Y_%m%d_%H%M`
#mysql user
user=root
#mysql password
pass=123456
#mysqldump -u$user -h 127.0.0.1 -P 3306 -p$pass --single-transaction $name > $dir$name$time.sql
mysqldump -u$user -p$pass  --master-data=2 $name > $dir$name$time.sql
#Delete data 14 days ago
find $dir -name "$name_*.sql" -type f -mtime +14 -exec rm {} ; > /dev/null 2>&1
#copy database 
cd $dir
scp -P 22 $dir$name$time.sql root@192.168.1.130:$dir