mysql 5个常用操作，添加用户配置对应数据库，开启远程访问，修改密码

1. 创建 mysql 用户：user1

mysql> CREATE USER 'user1'@'localhost' IDENTIFIED BY 'user1_password';

mysql> CREATE DATABASE IF NOT EXISTS `test_db` DEFAULT CHARACTER SET `utf8` COLLATE `utf8_unicode_ci`;

只允许本地访问，使用如下：

mysql> GRANT ALL PRIVILEGES ON test_db.* TO user1@'localhost';
mysql> flush privileges;

mysql> GRANT ALL PRIVILEGES ON test_db.* TO user1@'%' IDENTIFIED BY 'user1_password';
mysql> flush privileges;

并开启mysql允许远程访问配置，在 my.cnf 47行， bind-address 前增加 # 号，注释掉 bind-address = 127.0.0.1
sudo vi /etc/mysql/my.cnf

#bind-address = 127.0.0.1

重启 mysql

sudo service mysql restart

mysql> use mysql;
mysql> UPDATE user SET password=password("test123") WHERE user='root';   
mysql> flush privileges;
mysql> exit;