# service mysql stop
# service mysqlstart --skip-grant-tables //跳過授權表啓動MySQL服務程序
# mysql -u root //不需要密碼登錄
mysql> update mysql.user set password=password('123456') where host="localhost"; //通過修改mysql庫中user表的相關記錄重置密碼
Query OK, 0 rows affected (0.38 sec)
Rows matched: 1 Changed: 0 Warnings: 0
mysql> flush privileges; //刷新授權表
Query OK, 0 rows affected (0.14 sec)
# service mysql restart //重啓服務
# mysql -hlocalhost -uroot -p123456 //使用新密碼登錄
mysql>