修改mysql初始密码

grep 'temporary password' /var/log/mysqld.log

用该密码登录到服务端后，必须马上修改密码，不然会报如下错误：

mysql> select @@log_error;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
mysql>

修改密码

ALTER USER 'root'@'localhost' IDENTIFIED BY 'root123';