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利用crontab，系统每天定时备份mysql数据库 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。 作者 xiahuawuyu bitsCN.com
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