mysql -u root -p
welcome to the mysql monitor. commands end with ; or \g.
your mysql connection id is 6
server version: 5.6.23-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> use mysql;
database changed
mysql> select host,user,password from user;
| host | user | password |
| localhost | root | *6bb4837eb74329105ee4568dda7dc67ed2ca2ad9 |
| 127.0.0.1 | root | |
| ::1 | root | |
| localhost | | |
4 rows in set (0.00 sec)
mysql> update user set host=』%』 where user=』root』;
error 1062 (23000): duplicate entry 『%-root』 for key 『primary』
mysql> update user set host=』 %』 where user=』root』;
error 1062 (23000): duplicate entry 』 %-root』 for key 『primary』
mysql> select host,user from user where user=』root』;
| host | user |
| % | root |
| 127.0.0.1 | root |
| ::1 | root |
3 rows in set (0.00 sec)
mysql> flush privileges;
query ok, 0 rows affected (0.02 sec)
mysql> quit;
bye./etc/init.d/mysql restart
shutting down mysql. [ ok ]
starting mysql. [ ok ]
mysql -u root -p
error 1045 (28000): access denied for user 『root』@』localhost』 (using password: y
es)mysql -u root -p
welcome to the mysql monitor. commands end with ; or \g.
your mysql connection id is 6
server version: 5.6.23-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> exit;
byemysqladmin -uroot password 123456
mysql -uroot -p123456
welcome to the mysql monitor. commands end with ; or \g.
your mysql connection id is 6
server version: 5.6.23-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> grant all privileges on . to 『root』@』%』 identified by 『123456』 with gra
nt option;
query ok, 0 rows affected (0.00 sec)
mysql> flush privileges;
query ok, 0 rows affected (0.00 sec)
解釋下上面遇到的問題：
1.首先查詢有沒有開啟遠端訪問（可以讓任意ip通過root使用者訪問）
2.沒有開啟，則修改host=』%』，會報錯：error 1062 (23000): duplicateentry 』 %-root』for key』primary』
4.通過命令重新登入報錯：error 1045 (28000): access denied for user 『root』@』localhost』 (using password: yes)，原因是密碼變成空了，重新設定密碼：mysqladmin -uroot password 123456
5.這個時候訪問還是報錯： host ip is not allowed to connect to this mysql。通過以下兩個命令即可解決，grant all privileges on . to 『root』@』%』 identified by 『123456』 with grant option;flush privileges;
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