# /etc/init.d/mysqld stop# mysqld_safe --skip-grant-tables &# mysqlmysql> update mysql.user set auth
# /etc/init.d/mysqld stop# mysqld_safe --skip-grant-tables &# mysqlmysql> update mysql.user set authentication_string='' where user='root';mysql> flush privileges;mysql> alter user 'root'@'%' identified by '123';mysql> quit# service mysqld restart# mysql -uroot -p'123' 用新的密码登陆成功