用复制命令做文件异地备份

（方法一）

A主机10.10.1.101

B主机10.10.1.104

配置两台主机的对等性

在B主机

[oracle@localhost ~]$ mkdir .ssh

[oracle@localhost ~]$ chmod 700 .ssh

[oracle@localhost xxx]$ ssh-keygen -t rsa --生成rsa秘钥文件

Generating public/private rsa key pair.

Enter passphrase (empty for no passphrase):回车

Enter same passphrase again:回车

Your identification has been saved in /home/oracle/.ssh/id_rsa.

Your public key has been saved in /home/oracle/.ssh/id_rsa.pub.

The key fingerprint is:

35:f8:68:11:c7:24:69:35:02:89:8e:44:8b:56:06:e8
oracle@localhost.localdomain

[oracle@localhost ~]$ cd .ssh/

[oracle@localhost .ssh]$ ll

总计 16

-rw-r--r-- 1 oracle oinstall  410 2011-10-14 authorized_keys

-rw------- 1 oracle oinstall 1675 07-28 23:34 id_rsa   --私钥

-rw-r--r-- 1 oracle oinstall  410 07-28 23:34 id_rsa.pub --公钥

[oracle@localhost .ssh]$ ssh-keygen -t dsa  --生成dsa秘钥

Generating public/private dsa key pair.

Enter file in which to save the key (/home/oracle/.ssh/id_dsa):回车

Enter passphrase (empty for no passphrase): 回车

Enter same passphrase again:回车

Your identification has been saved in /home/oracle/.ssh/id_dsa.

Your public key has been saved in /home/oracle/.ssh/id_dsa.pub.

The key fingerprint is:

9a:7c:ef:d0:38:d2:71:0c:c6:c9:91:25:6d:14:76:48
oracle@localhost.localdomain

[oracle@localhost .ssh]$ ls -al

总计 32

drwx------  2 oracle oinstall 4096 07-28 23:38 .

drwx------ 21 oracle oinstall 4096 07-28 23:12 ..

-rw-r--r--  1 oracle oinstall  410 2011-10-14 authorized_keys

-rw-------  1 oracle oinstall  668 07-28 23:38 id_dsa  --私钥

-rw-r--r--  1 oracle oinstall  618 07-28 23:38 id_dsa.pub --公钥

-rw-------  1 oracle oinstall 1675 07-28 23:34 id_rsa

-rw-r--r--  1 oracle oinstall  410 07-28 23:34 id_rsa.pub

同理在A主机生成ssh的秘钥文件

用户名要一致，操作略

回到B主机

[oracle@localhost .ssh]$ cat ~/.ssh/id_rsa.pub >>~/.ssh/authorized_keys 把rsa的公钥放到家目录下的ssh下的authorized_keys

[oracle@localhost .ssh]$ cat ~/.ssh/id_dsa.pub >>~/.ssh/authorized_keys 把dsa也放进去

[oracle@localhost ~]$ ssh 10.10.1.101 cat ~/.ssh/id_rsa.pub >>~/.ssh/authorized_keys  --把101的rsa放进来

The authenticity of host '10.10.1.101 (10.10.1.101)' can't be established.

RSA key fingerprint is f7:79:23:3b:bc:f9:c7:c1:01:3b:16:d8:1e:45:81:16.

Are you sure you want to continue connecting (yes/no)? y

Please type 'yes' or 'no': yes

Warning: Permanently added '10.10.1.101' (RSA) to the list of known hosts.

oracle@10.10.1.101's password:  --输入A主机的oracle登陆密码

[oracle@localhost ~]$ ssh 10.10.1.101 cat ~/.ssh/id_dsa.pub >>~/.ssh/authorized_keys --把101的dsa放进来

oracle@10.10.1.101's password:--输入A主机的oracle登陆密码

[oracle@localhost .ssh]$ scp authorized_keys 10.10.1.101:/home/oracle/.ssh/authorized_keys  --把生成完成的秘钥文件也放在A主机的.ssh文件夹下
oracle@10.10.1.101's password:--输入A主机的oracle登陆密码

首次传送需要密码验证

[oracle@localhost .ssh]$ ssh x101 date

The authenticity of host 'x101 (10.10.1.101)' can't be established.

RSA key fingerprint is f7:79:23:3b:bc:f9:c7:c1:01:3b:16:d8:1e:45:81:16.

Are you sure you want to continue connecting (yes/no)? yes --输入yes

Warning: Permanently added 'x101' (RSA) to the list of known hosts.

Mon Jul 28 23:59:11 CST 2014

[oracle@localhost .ssh]$ ssh x101 date 再次传输不用再次密码验证了

Mon Jul 28 23:59:17 CST 2014

[oracle@localhost .ssh]$

[oracle@localhost .ssh]$ scp x101:/home/oracle/xxx/xxx.txt ~/xxx/

[oracle@localhost xxx]$ cat xxx.txt 

ceshi

验证成功

同理如果三台机建立互信关系，把各自的id_dsa.put文件放到 authorized_keys中来即可

(方法二)

在A主机，新建共享文件夹

mk -m 777 /home/oracle/xxx/Xshare

修改/etc/exports文件，添加一条 /home/oracle/xxx/Xshare *(rw), *为全部IP可以访问，也可以指定IP

重启nfs服务：service nfs restart

在B主机

建立对应挂载文件夹

mk -m 777 /home/oracle/xxx/Xshare

挂载

mount -t nfs 10.10.1.101: /home/oracle/xxx/Xshare  /home/oracle/xxx/Xshare

编写复制脚本

[oracle@hnmtvcrm xxx]$ vi MoveBakData.sh

#!bin/sh

YESTERDAY=`date -d "yesterday" "+%Y%m%d"`

SID="hngdcrm"

DES_DIR="/home/oracle/xxx/Xshare/104databak"

BAK_DIR="/home/oracle/orabak"

#BAK_DIR="/app_crm/bakdata"

BAK_FILE=${BAK_DIR}/$SID${YESTERDAY}.dmp

LOG_FILE=${BAK_DIR}/$SID${YESTERDAY}.log

D_BAK_FILE=${DES_DIR}/$SID${YESTERDAY}.dmp

D_LOG_FILE=${DES_DIR}

#$SID${YESTERDAY}.log

cd $D_LOG_FILE

#echo BAK_FILE $BAK_FILE

#echo LOG_FILE $LOG_FILE

#echo D_LOG_FILE $D_LOG_FILE

#cat D_LOG_FILE

cp $LOG_FILE  $D_LOG_FILE

cp $BAK_FILE $DES_DIR/

[oracle@hngdcrm 104Share]$ crontab -e

#################################异地备份

0 5 * * * /bin/bash /homr/oracle/xxx/MoveBakData.sh >>/home/oracle/xxx/log/copy.log 2>&1

注明：/BIN/bash 如果不添加，会没有权限执行脚本文件

/home/oracle/xxx/log/copy.log 记录运行日记

A主机

编写删除过期脚本

[oracle@localhost xxx]$ vi DelDataBak.sh

#!/bin/sh

SID="hngdcrm"

YESTERDAY=`date -d -4day "+%Y%m%d"`

DATA_DIR="/home/oracle/xxx/xshare"

DATA_FILE=$DATA_DIR/$SID${YESTERDAY}.dmp

LOG_FILE=$DATA_DIR/$SID${YESTERDAY}.log

#echo $LOG_FILE

#echo $DATA_FILE

rm -f $DATA_FILE

rm -f  $LOG_FILE

[oracle@localhost xxx]$ crontab -e

###########################删除4天前备份数据

0 6 * * * /bin/bash /home/oracle/xxx/DelDataBak.sh  >>/home/oracle/xxx/log/copy.log 2>&1