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linux定时备份mysql数据库  

Jun 07, 2016 pm 03:53 PM
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利用crontab,系统每天定时备份mysql数据库 【内容提要】利用系统crontab来定时执行备份文件,按日期对备份结果进行保存,达到备份的目的。 利用系统crontab来定时执行备份文件,按日期对备份结果进行保存,达到备份的目的。 1、创建保存备份文件的路径/mysq

利用crontab,系统每天定时备份mysql数据库

【内容提要】利用系统crontab来定时执行备份文件,按日期对备份结果进行保存,达到备份的目的。

利用系统crontab来定时执行备份文件,按日期对备份结果进行保存,达到备份的目的。

1、创建保存备份文件的路径/mysqldata

#mkdir /mysqldata

2、创建/usr/sbin/bakmysql文件

#vi /usr/sbin/bakmysql

输入

rq=` date +%Y%m%d `

tar zcvf /mysqldata/mysql$rq.tar.gz /var/lib/mysql

或者写成

rq=` date +%Y%m%d `

mysqldump --all-databases -u root -p密码 > /mysqldata/mysql$rq.sql

/var/lib/mysql是你数据库文件的目录,部分用户是/usr/local/mysql/data,每个人可能不同

/mysqldata/表示保存备份文件的目录,这个每个人也可以根据自己的要求来做。

3、修改文件属性,使其可执行

# chmod +x /usr/sbin/bakmysql

4、修改/etc/crontab

#vi /etc/crontab

在下面添加

01 3 * * * root /usr/sbin/bakmysql

表示每天3点钟执行备份

5、重新启动crond

# /etc/rc.d/init.d/crond restart

完成。

这样每天你在/mysqldata可以看到这样的文件

mysql20040619.tar.gz

你直接下载就可以了。

 

 

基本格式 :

*  *  *  *  *  command

分 时 日 月 周 命令

第1列表示分钟1~59 每分钟用*或者 */1表示

第2列表示小时1~23(0表示0点)

第3列表示日期1~31

第4列表示月份1~12

第5列标识号星期0~6(0表示星期天)

第6列要运行的命令

crontab文件的一些例子:

30 21 * * * /usr/local/etc/rc.d/lighttpd restart

上面的例子表示每晚的21:30重启apache。

45 4 1,10,22 * * /usr/local/etc/rc.d/lighttpd restart

上面的例子表示每月1、10、22日的4 : 45重启apache。

10 1 * * 6,0 /usr/local/etc/rc.d/lighttpd restart

上面的例子表示每周六、周日的1 : 10重启apache。

0,30 18-23 * * * /usr/local/etc/rc.d/lighttpd restart

上面的例子表示在每天18 : 00至23 : 00之间每隔30分钟重启apache。

0 23 * * 6 /usr/local/etc/rc.d/lighttpd restart

上面的例子表示每星期六的11 : 00 pm重启apache。

* */1 * * * /usr/local/etc/rc.d/lighttpd restart

每一小时重启apache

* 23-7/1 * * * /usr/local/etc/rc.d/lighttpd restart

晚上11点到早上7点之间,每隔一小时重启apache

0 11 4 * mon-wed /usr/local/etc/rc.d/lighttpd restart

每月的4号与每周一到周三的11点重启apache

0 4 1 jan * /usr/local/etc/rc.d/lighttpd restart

一月一号的4点重启apache

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