linux系统下MYSQL备份恢复(主要看红色字体部分)_MySQL
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数据库备份是非常重要的,如果定期做好备份,这样就可以在发生系统崩溃时回复数据到最后一次正常的状态,把顺势减小到最少。
一、 用名航实现备份
MySQL提供了一个mysqldump命令,我们可以用它进行数据库备份,下面假设呀哦备份tm这个数据库:
#mysqldump -u root -p tm > tm_050519.sql
#mysqldump -u root -p tm | gzip > tm_050519.sql.gz
#mysql -u root -p tm < tm_050519.sql
从压缩文件直接恢复:
#gunzip < tm_050519.sql.gz | mysql -u root -p tm
二、利用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
#vi /usr/sbin/bakmysql
rq=` date +%Y%m%d `tar zcvf /mysqldata/mysql$rq.tar.gz /var/lib/mysql
rq=` date +%Y%m%d `mysqldump --all-databases -u root -p密码 > /mysqldata/mysql$rq.sql
/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需求来做
3、修改文件属性,使其可执
# chmod +x /usr/sbin/bakmysql
#vi /etc/crontab
01 3 * * * root /usr/sbin/bakmysql
5、重启crond
# /etc/rc.d/init.d/crond restart
这样每天你在/mysqldata可以看到这样的文件
mysql20140324.tar.gz
你直接下载就可以了
cd /usr/local/mysql/bin
mysqldump -u用户名 -p密码 --databases 库名 >/backdata/ddd14-03-23.sql
mysqladmin create target_db_namemysql target_db_name < backup-file.sql

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