(1)确认无人使用后,停止mysql数据库
#service mysql stop
(2)采用安全模式启动mysql,并在后台运行
# mysqld_safe --skip-grant-tables &
(3)进入mysql,并修改密码
#mysql mysql>use mysql; mysql> update user set password=password("root") WHERE user='root';
(4)重启mysql服务即可
#service mysql stop
# mysqld_safe --skip-grant-tables &
#mysql mysql>use mysql; mysql> update user set password=password("root") WHERE user='root';