说明:我这里要把MySql数据库存放目录/var/lib/mysql下面的所有文件备份到/home/mysql_data里面 并且保存为mysql_data20121220.tar.gz的压缩文件(20121220是指备份执行时当天的日期) 然后只保留最近7天的备份 1、创建保存备份文件的路径:/home/mysql_data
说明:我这里要把MySql存放目录/var/lib/mysql下面的所有文件备份到/home/mysql_data里面
并且保存为mysql_data20121220.tar.gz的压缩文件(20121220是指备份执行时当天的日期)
然后只保留最近7天的备份
1、创建保存备份文件的路径:/home/mysql_data
cd /home
mkdir mysql_data
2、创建备份脚本文件:/home/mysql_data/mysql_databak.sh
cd /home
cd mysql_data
touch mysql_databak.sh
vim mysql_databak.sh
输入以下内容:
##################################################################################
#!/bin/sh
/etc/init.d/mysqld stop #执行备份前先停止MySql,防止有数据正在写入,备份出错
date=` date +%Y%m%d ` #获取当前日期
DAYS=7 #DAYS=7代表删除7天前的备份,即只保留最近7天的备份
BK_DR=/home/mysql_data #备份文件存放路径
DB_DR=/var/lib/mysql #数据库路径
LINUX_USER=root #系统用户名
tar zcvf $BK_DR/mysql_data$date.tar.gz $DB_DR #备份数据
/etc/init.d/mysqld start #备份完成后,启动MySql
chown -R $LINUX_USER:$LINUX_USER $BK_DR #更改备份数据库文件的所有者
find $BK_DR -name "mysql_data*" -type f -mtime +$DAYS -exec rm {} \; #删除7天前的备份文件
##################################################################################
3、修改文件属性,使其可执行
chmod +x /home/mysql_data/mysql_databak.sh
4、修改/etc/crontab
vi /etc/crontab
在下面添加
35 13 * * * root /home/mysql_data/mysql_databak.sh
表示每天13点35钟执行备份
5、重新启动crond使设置生效
/etc/rc.d/init.d/crond restart
chkconfig crond on #设为开机启动
service crond start #启动
每天你在/home/mysql_data目录下面可以看到类似mysql_data20121220.tar.gz这样的压缩文件
如果需要恢复文件的时候,只需要把这个文件解压即可
解压缩tar -zxvf mysql_data20121220.tar.gz

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