linux平台mysql密码设置

登录mysql默认没有指定账号

 

查看默认账号是谁

select user();

mysql> select user();
+----------------+
| user() |
+----------------+
| ODBC@localhost |
+----------------+
1 row in set (0.03 sec)

默认账号是 ODBC

 

切换mysql账号

 

-u 指定mysql账号

-p 指定mysql密码

 

mysql -uroot -p

mysql -uroot -p -h127.0.0.1
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 236589218
Server version: 5.6.20-log Source distribution

Copyright (c) 2000, 2014, 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> select user();
+----------------+
| user()         |
+----------------+
| root@localhost |
+----------------+
1 row in set (0.00 sec)

登录设置密码

初始状态下，管理员root，密码为空，默认只允许从本机登录localhost

设置初始密码

mysqladmin -uroot password "123"        设置初始密码 由于原密码为空，因此-p可以不用

也可以设置-p

mysqladmin -uroot -p password "123"

[root@mysql ~]# mysql -uroot -p
Enter password: 
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
[root@mysql ~]# mysql -uroot -p123
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 6
Server version: 5.1.73 Source distribution

Copyright (c) 2000, 2013, 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> 

修改mysql密码

mysqladmin -uroot -p"123" password "456"        修改mysql密码,因为已经有密码了，所以必须输入原密码才能设置新密码