#mysql错误：（密码不正确，需要重置密码）
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
#编辑配置文件
[root@m1 mysql]# vi /roobo/server/mysql/my.cnf
[mysqld]
skip-grant-tables
#修改完后重启服务
[root@m1 mysql]# /etc/init.d/mysqld restart
#登录数据库
[root@m1 mysql]# mysql
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 1
Server version: 5.6.24-log Source distribution
Copyright (c) 2000, 2015, 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>
mysql> use mysql;
mysql> update user set password=password("你的新密码") where user="root";
mysql> flush privileges;
mysql> quit
#再把vi my.cnf 配置文件中下面参数删除。
[mysqld]
skip-grant-tables
#修改完后重启服务
[root@m1 mysql]# /etc/init.d/mysqld restart
#再用设置的密码登录
mysql -uroot -p
passwd:******
mysql error 1044(42000)错误
[root@m1 ~]# mysql -uroot -p
Enter password:
ERROR 1049 (42000): Unknown database '127.0.0.1'
[root@m1 ~]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 18
Server version: 5.6.24-log Source distribution
Copyright (c) 2000, 2015, 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.
#授权
mysql> grant all on work.* to work@'192.168.1.4' identified by 'juan3652014';
ERROR 1044 (42000): Access denied for user 'root'@'localhost' to database 'work'
原因： 授权需要WITH GRANT OPTION 才能授权，否则会报。
mysql> show grants for root@'localhost';
+----------------------------------------------------------------------------------------------------------------------+
| Grants for root@localhost |
+----------------------------------------------------------------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY PASSWORD '*F109C974766912D490ECD7E3C8754542FC773A49' |
| GRANT PROXY ON ''@'' TO 'root'@'localhost' WITH GRANT OPTION
+----------------------------------------------------------------------------------------------------------------------+
2 rows in set (0.00 sec)
解决方法：
#登录mysql
mysql -uroot -p -h 127.0.0.1
mysql> use mysql
Database changed
mysql> select user,host from user;
+--------+-------------+
| user | host |
+--------+-------------+
| root | 127.0.0.1 |
| rep | 192.168.1.% |
| work | 192.168.1.4 |
| root | localhost |
| zabbix | localhost |
+--------+-------------+
5 rows in set (0.00 sec)
#授权成功
grant all on work.* to work@'192.168.1.4' identified by 'juan3652014';
flush privileges;
如上所示，root@localhost账号没有WITH GRANT OPTION选项，关于WITH GRANT OPTION选项，如果想让授权的用户，也可以将这些权限授予给其他用户，需要选项 “WITH GRANT OPTION“ 。也就是说有这个选项就可以将权限传递给第三方。这也是上面root@localhost用户给其它用后授权报错的原因，如果以 root@127.0.0.1登录（此账号拥有WITHGRANT OPTION选项），创建用户并授权就不会有这个错误。