mysql修改密碼、設置mysql遠程訪問

1.mysql修改密碼
mysql修改密碼可以直接在 Navicat for MySQL 下面直接執行 SET PASSWORD FOR ‘root’@‘localhost’ = PASSWORD(‘newpass’);
CentOS7操作系統下修改mysql密碼方法:
方法1： 用SET PASSWORD命令

　　mysql -u root

　　mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpass');

方法2：用mysqladmin

mysqladmin -u root password "newpass"

如果root已經設置過密碼，採用如下方法

mysqladmin -u root password oldpass "newpass"

方法3： 用UPDATE直接編輯user表

　　mysql -u root

　　mysql> use mysql;

　　mysql> UPDATE user SET Password = PASSWORD('newpass') WHERE user = 'root';

　　mysql> FLUSH PRIVILEGES;

在丟失root密碼的時候，可以這樣

　　mysqld_safe --skip-grant-tables&

　　mysql -u root mysql

　　mysql> UPDATE user SET password=PASSWORD("new password") WHERE user='root';

　　mysql> FLUSH PRIVILEGES;

2.設置mysql遠程訪問
將host字段的值改爲%就表示在任何客戶端機器上能以root用戶登錄到mysql服務器，建議在開發時設爲%。
update user set host = ’%’ where user = ’root’;

將權限改爲ALL PRIVILEGES

mysql> use mysql;
Database changed
mysql> grant all privileges  on *.* to root@'%' identified by "password";
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> select host,user,password from user;
+--------------+------+-------------------------------------------+
| host         | user | password                                  |
+--------------+------+-------------------------------------------+
| localhost    | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E |
| 192.168.1.1 | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E |
| %            | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E |
+--------------+------+-------------------------------------------+
3 rows in set (0.00 sec)

這樣機器就可以以用戶名root密碼root遠程訪問該機器上的MySql.
注：flush privileges;爲更新配置，不能少