发布于 2015-06-02 02:56:56 | 2456 次阅读 | 评论: 1 | 来源: PHPERZ
Mysql关系型数据库管理系统
MySQL是一个开放源码的小型关联式数据库管理系统，开发者为瑞典MySQL AB公司。MySQL被广泛地应用在Internet上的中小型网站中。由于其体积小、速度快、总体拥有成本低，尤其是开放源码这一特点，许多中小型网站为了降低网站总体拥有成本而选择了MySQL作为网站数据库。
新装的mysql，访问mysql数据库是遇到问题：ERROR 1044 (42000): Access denied for user ''@'localhost'to database 'mysql'，
[root@dzwww mysql-5.1.61]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.1.61 Source distribution
Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> use mysql
ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'mysql'
mysql>
打开my.ini,在
[mysqld]
skip-external-locking
skip-name-resolve
#skip-grant-tables
其中skip-grant-tables跳过权限验证是被注释掉的，去掉注释，重新启动mysql：
[root@aaa libexec]# /usr/local/mysql/libexec/mysqld --basedir=/usr/local/mysql --datadir=/data0/mysqldata --user=mysql --log-error=/data0/mysqldata/mysql-error.log --open-files-limit=20000 --pid-file=/data0/mysqldata/dzwww.com-B15-5-3-36.pid --socket=/tmp/mysql.sock --port=3306
[root@dzwww mysql-5.1.61]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.1.61-log Source distribution
Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> use mysql
Database changed
mysql>grant all privileges on *.* to root@localhost identified by 'mysql'
然后重新登录 ok,成功！