18.04 에 mysql 설치하기

1. mysql 설치

  > sudo apt update
  > sudo apt install mysql-server

2. mysql 설정하기

  > sudo mysql_secure_installation

Securing the MySQL server deployment.Connecting to MySQL using a blank password.The 'validate_password' plugin is installed on the server.The subsequent steps will run with the existing configurationof the plugin.Please set the password for root here.New password: Re-enter new password: Estimated strength of the password: 50 Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No) : yBy default, a MySQL installation has an anonymous user,allowing anyone to log into MySQL without having to havea user account created for them. This is intended only fortesting, and to make the installation go a bit smoother.You should remove them before moving into a productionenvironment.Remove anonymous users? (Press y|Y for Yes, any other key for No) : n ... skipping.Normally, root should only be allowed to connect from'localhost'. This ensures that someone cannot guess atthe root password from the network.Disallow root login remotely? (Press y|Y for Yes, any other key for No) : ySuccess.By default, MySQL comes with a database named 'test' thatanyone can access. This is also intended only for testing,and should be removed before moving into a productionenvironment.Remove test database and access to it? (Press y|Y for Yes, any other key for No) : n ... skipping.Reloading the privilege tables will ensure that all changesmade so far will take effect immediately.Reload privilege tables now? (Press y|Y for Yes, any other key for No) : ySuccess.All done!


2. mysql 로그인 하기

  > sudo mysql -u root

Welcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 9Server version: 5.7.24-0ubuntu0.18.04.1 (Ubuntu)Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql>


3. Database 생성

  mysql> create database lora_db;

mysql> show databases;+--------------------+| Database |+--------------------+| information_schema || mysql || performance_schema || sys |+--------------------+4 rows in set (0.00 sec)mysql> create database lora_db;Query OK, 1 row affected (0.00 sec)mysql> show databases;+--------------------+| Database |+--------------------+| information_schema || lora_db || mysql || performance_schema || sys |+--------------------+5 rows in set (0.00 sec)mysql>

4. Table 생성

   mysql> use lora_db;
   mysql> create table ..... ;

mysql> use lora_db;Database changedmysql> show tables;Empty set (0.00 sec)mysql> drop table if exists GROUP_INFO;Query OK, 0 rows affected, 1 warning (0.00 sec)mysql> create table GROUP_INFO( -> SEQ bigint not null, -> NAME varchar(32), -> ICON varchar(32), -> primary key(SEQ) -> );Query OK, 0 rows affected (0.08 sec)mysql> show tables;+-------------------+| Tables_in_lora_db |+-------------------+| GROUP_INFO |+-------------------+1 row in set (0.00 sec)mysql>


5. 사용자 등록 및 권한부여

   mysql> create user 'lora'@'localhost' identified by '1234';
   mysql> grant all privileges on lora_db.* to 'lora'@'localhost';

mysql> uninstall plugin validate_password;Query OK, 0 rows affected (0.07 sec)mysql> create user 'lora'@'localhost' identified by '1234';Query OK, 0 rows affected (0.00 sec)mysql> grant all privileges on lora_db.* to 'lora'@'localhost';Query OK, 0 rows affected (0.00 sec)

6. Password 정책 해제방법
   
   mysql> uninstall plugin validate_password;