MySQL修改root密码

1. 在Navicat for MySQL下面直接执行：
   SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpass');
2. 用SET PASSWORD命令
   mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpass');
3. 用mysqladmin命令
   mysqladmin -u root password "newpass"
4. 如果root已经设置过密码，采用如下方法：
   mysqladmin -u root -p oldpass password "newpass"

5. 用UPDATE直接编辑user表

   mysql -u root
   mysql> use mysql;
   mysql> UPDATE user SET Password = PASSWORD('newpass') WHERE user = 'root';
   mysql> FLUSH PRIVILEGES;

忘记root密码解决办法

mysqld_safe --skip-grant-tables&
mysql -u root mysql
mysql> UPDATE user SET password=PASSWORD("new password") WHERE user='root';
mysql> FLUSH PRIVILEGES;

root远程登陆设置

在本机先使用root用户登录:
mysql：mysql -u root -p"youpassword"
进行授权操作：
mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '密码' WITH GRANT OPTION;
重载授权表： FLUSH PRIVILEGES;

数据存放目录修改

打开配置文件 /etc/my.cnf

[mysqld]
datadir=/mysql          //修改为自己的数据存放目录
socket=/var/lib/mysql/mysql.sock
[client]
socket=/var/lib/mysql/mysql.sock