Linux自动备份并ssh传输到远程备份脚本

假设A,B两服务器,现在需要在A机上用root登陆B机,而不需要输入密码,那我们可按照下面的步骤来做：

1）在A机上生成钥匙对,执行以下命令：

ssh-keygen -t rsa

Generating public/private rsa key pair.

Enter file in which to save the key (/root/.ssh/id_rsa): /root/.ssh/id_rsa

Enter passphrase (empty for no passphrase):直接回车

Enter same passphrase again:直接回车

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:

f6:61:a8:27:35:cf:4c:6d:13:22:70:cf:4c:c8:a0:23 root@host1

这样,在/root/.ssh/路径下会生成id_rsa,和id_rsa.pub,其中id_rsa是密钥,id_rsa.pub是公钥.

2）把在A机生成的id_rsa.pub拷贝到B机上,假设拷贝到B机的临时目录下,如：

scp /root/.ssh/id_rsa.pub root@218.242.214.20:/tmp

3）用root帐号登陆B机,进入其主目录,创建authorized_keys文件,并设置好权限.

cd ~/.ssh

cat /tmp/id_rsa.pub >>authorized_keys

chmod 400 authorized_keys

rm -f /tmp/id_rsa.pub

4）重新打开A的链接窗口,命令行下输入

ssh 218.242.214.20

就可以看到直接进入了.

下面是代码部分.

#!/bin/sh 
backdir="/backup/mysql_date" 
dirname="$(date  %Y%m%d)" 
dirname_y="$(date  %Y)" 
dirname_m="$(date  %m)" 
targz="_192.168.1.6" 
DIR="192.168.1.6" 
for dir in $DIR 
do 
  mkdir -p $backdir/$dirname_y/$dirname_m/$dir 
  mkdir -p /$dirname$targz 
done 
 
 
#update 
cp -r /var/tmp/beoserver/test1.txt /var/tmp/beoserver/test2.txt /$dirname$targz 
 
#web backup 
tar zcfP /$backdir/$dirname_y/$dirname_m/$dir/$dirname$targz.tar.gz  /$dirname$targz 
 
scp /$backdir/$dirname_y/$dirname_m/$dir/$dirname$targz.tar.gz root@192.168.1.200:/var/tmp 
rm -rf /$dirname$targz 

把脚本加入到自动运行：

先查看是否crond服务开机启动：

[root@localhost ~]# chkconfig --list crond
crond 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:启用 6:关闭

2-5启动代表开机启动.

添加语句：

[root@localhost ~]#crontab -e

添加如下内容

00 02 * * * /backup/bin/arc.sh

上面语句代表每天凌晨两点运行arc.sh脚本.

具体含义搜索crontab即可.

ssh脚本传输备份参考了：

http://blogold.chinaunix.net/u1/46940/showart_476005.html

http://blog.163.com/pursue100@yeah/blog/static/165732158201102101719547/

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