Ubuntu 18.04.4安装mysql的过程详解 亲测可用

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下面看下Ubuntu 18.04.4安装mysql的过程，内容如下所示：

1. 1 sudo apt-get update

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1. 2 sudo apt-get install mysql-server

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1. 3 sudo mysql_secure_installation # 初始化配置
   
2. #1
   
3. VALIDATE PASSWORD PLUGIN can be used to test passwords...
   
4. Press y|Y for Yes, any other key for No: N (我的选项)
   
5. #2
   
6. Please set the password for root here...
   
7. New password: (输入密码)
   
8. Re-enter new password: (重复输入)
   
9. #3
   
10. By default, a MySQL installation has an anonymous user,
    
11. allowing anyone to log into MySQL without having to have
    
12. a user account created for them...
    
13. Remove anonymous users? (Press y|Y for Yes, any other key for No) : N (我的选项)
    
14. #4
    
15. Normally, root should only be allowed to connect from
    
16. 'localhost'. This ensures that someone cannot guess at
    
17. the root password from the network...
    
18. Disallow root login remotely? (Press y|Y for Yes, any other key for No) : Y (我的选项)
    
19. #5
    
20. By default, MySQL comes with a database named 'test' that
    
21. anyone can access...
    
22. Remove test database and access to it? (Press y|Y for Yes, any other key for No) : N (我的选项)
    
23. #6
    
24. Reloading the privilege tables will ensure that all changes
    
25. made so far will take effect immediately.
    
26. Reload privilege tables now? (Press y|Y for Yes, any other key for No) : Y (我的选项)
    
27. 4 systemctl status mysql.service # 检查服务器状态

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1. 4 systemctl status mysql.service # 检查服务器状态

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running代表无问题

1. 5 修改mysql 端口号以及将监听地址改为所有
   
2. 
   
3. vim /etc/mysql/mysql.conf.d/mysqld.cnf # 编辑配置文件
   
4. bind-address            = 0.0.0.0  #将监听ip修改为所有
   
5. port            = 3388  # 监听端口修改为3388，可以不改我这是为了安全
   
6. 修改完毕之后重启服务
   
7. systemctl restart mysql.service

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1. 6 开放mysql远程访问
   
2. 1 登录数据库
   
3. mysql -u root -p
   
4. 
   
5. 2 切换到数据库mysql
   
6. use mysql
   
7. 3 删除匿名用户
   
8. delete from user where user='';
   
9. 4 增加允许远程访问的用户或者允许现有用户的远程访问
   
10. 给root授予在任意主机（%）访问任意数据库的所有权限
    
11. mysql> grant all privileges on *.* to 'root'@'%' identified by '这里替换成你想要设置的密码' with grant option;
    
12. flush privileges;
    
13. 5 退出数据库
    
14. mysql> exit
    
15. 6 重启数据库
    
16. sudo service mysql restart

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