linux下mysql数据库的备份与还原
一、进入数据库的目录 /var/lib/mysql 二、备份数据库 mysqldump -u root -paaaaaa bugtracker /opt/bugtracker_bak.sql 其中root为用户名，aaaaaa为密码，bugtracker为要备份导出的数据库，/opt/bugtracker_bak.sql为数据库保存为的sql式文件 三、导入数据
一、进入数据库的目录
/var/lib/mysql
二、备份数据库
mysqldump -u root -paaaaaa bugtracker > /opt/bugtracker_bak.sql
其中root为用户名，aaaaaa为密码，bugtracker为要备份导出的数据库，/opt/bugtracker_bak.sql为数据库保存为的sql格式文件
三、导入数据库
mysql -uroot -paaaaaa bugtracker
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