MySQL配置和设置问题小结

问题1：

[root@Tony_ts_tian bin]# mysqladmin -uroot password 'kaka123'
mysqladmin: connect to server at 'localhost' failed
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)'
[root@Tony_ts_tian bin]# mysql
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
[root@Tony_ts_tian bin]# mysql -u root -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost'(using password: YES)

问题1.1：

发现mysql数据库下user表中，Host和User为两个主键列。

mysql> update user set host='%' where user='root';
ERROR 1062 (23000): Duplicate entry '%-root' for key 'PRIMARY'

解决1 （7：忘记密码）：

[root@Tony_ts_tian bin]# service mysqld stop 
Shutting down MySQL.. SUCCESS! 
[root@Tony_ts_tian bin]# mysqld_safe --user=root --skip-grant-tables --skip-networking &
[1] 30273
[root@Tony_ts_tian bin]# 151013 15:40:40 mysqld_safe Logging to '/var/lib/mysql/Tony_ts_tian.err'.
151013 15:40:40 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql

注：--skip-grant-tables 启动mysql时不启动grant-tables，授权表

       --skip-networking关闭MySQL的TCP/IP连接方式，跳过网络

注：不要关闭上个终端，再次打开一个终端。
执行以下指令:

root@Tony_ts_tian init.d]# mysql -u root
mysql> use mysql
mysql> UPDATE user SET Password=PASSWORD('kaka321') where USER='root';
mysql> flush privileges;
mysql> quit
[root@Tony_ts_tian bin]# service mysqld start
[root@Tony_ts_tian bin]# service mysqld restart
[root@Tony_ts_tian bin]# mysql -u root -p
Enter password:
………………ok.

或者：

UPDATE `user` SET Host='%' WHERE Host='127.0.0.1' AND User='root'

注：也可使用：/etc/mysql/debian.cnf文件中[client]下配置的密码。

问题2：

mysql> use mysql
ERROR 1820 (HY000): You must SET PASSWORD before executing this statement

解决2：

mysql> SET PASSWORD = PASSWORD('kaka321');
Query OK, 0 rows affected (0.00 sec)

修改后继续使用。
问题3：

mysql> INSERT INTO mysql.user(Host,User,Password) VALUES("10.155.123.55","kaka",PASSWORD("kaka123"));
ERROR 1364 (HY000): Field 'ssl_cipher' doesn't have a default value
mysql> INSERT INTO mysql.user(Host,User,Password,ssl_cipher) VALUES("10.155.123.55","kaka",PASSWORD("kaka123"),"");
ERROR 1364 (HY000): Field 'x509_issuer' doesn't have a default value
mysql> INSERT INTO mysql.user(Host,User,Password,ssl_cipher,x509_issuer) VALUES("10.155.123.55","kaka",PASSWORD("kaka123"),"","");
ERROR 1364 (HY000): Field 'x509_subject' doesn't have a default value
mysql> INSERT INTO mysql.user(Host,User,Password,ssl_cipher,x509_issuer) VALUES("10.155.123.55","kaka",PASSWORD("kaka123"),"","");
ERROR 1364 (HY000): Field 'x509_subject' doesn't have a default value

解决3：

mysql> INSERT INTO mysql.user(Host,User,Password,ssl_cipher,x509_issuer,x509_subject) VALUES("10.155.123.55","kaka",PASSWORD("kaka123"),"","","");
Query OK, 1 row affected (0.03 sec)

问题4：

 ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'weloveshare'

解决4：

[root@Tony_ts_tian bin]# mysql -u root -p;
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 7
Server version: 5.1.73 Source distribution

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mysql> 密码正确，就可以登录了.