Linux 免密码 双机信任拷贝 及 mysqldump

A服务器：
[[email?protected] ~]# ssh-keygen -t rsa
[[email?protected] ~]# cat ~/.ssh/id_rsa.pub
[[email?protected] ~]# scp id_rsa.pub [email?protected]:/root/.ssh/authorized_keys

B服务器：
[[email?protected] ~]# ssh-keygen -t rsa
[[email?protected] ~]# cat ~/.ssh/id_rsa.pub
[[email?protected] ~]# scp id_rsa.pub [email?protected]:/root/.ssh/authorized_keys

A服务器：
[[email?protected] ~]## cat bak.sh
#!/bin/bash
mysqldump -uroot -p123456 ultrax > /root/dbbak/ultraxdate +%Y%m%ddate +%H:%M:%S.sql
scp /root/dbbak/ultrax*.sql [email?protected]:/tmp

A服务器：
[[email?protected] ~]## sh bak.sh

A服务器：
[[email?protected] ~]# crontab -l
55 23 * /root/dbbak/bak.sh

定时拷贝或者手动拷贝 都不要密码了.