1．修改MySQL的登录设置：
# vi /etc/my.cnf
在[mysqld]的段中加上一句：skip-grant-tables
例如：
[mysqld]datadir=/var/lib/mysqlsocket=/var/lib/mysql/mysql.sockskip-grant-tables
保存并且退出vi。
2．重新启动mysqld
# ./home/mariadb/bin/mysqld restartStopping MySQL: [ OK ]Starting MySQL: [ OK ]
3．登录并修改MySQL的root密码
# ./home/mariadb/bin/mysqlWelcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 3 to server version: 3.23.56Type 'help;' or '\h' for help. Type '\c' to clear the buffer.mysql> USE mysql ;Reading table information for completion of table and column namesYou can turn off this feature to get a quicker startup with -ADatabase changedmysql> UPDATE user SET Password = password('new-password') WHERE User = 'root' ;Query OK, 0 rows affected (0.00 sec)Rows matched: 2 Changed: 0 Warnings: 0mysql> flush privileges ;Query OK, 0 rows affected (0.01 sec)mysql> quitBye
4．将MySQL的登录设置修改回来
# vi /etc/my.cnf
将刚才在[mysqld]的段中加上的skip-grant-tables删除
保存并且退出vi。
5．重新启动mysqld
# ./home/mariadb/bin/mysqld restartStopping MySQL: [ OK ]Starting MySQL: [ OK ]