Ubuntu 安裝mysql8

1. sudo apt-get update #更新源

2. sudo apt-get install mysql-server #安裝mysql服務

3. 安裝過程中 繼續執行選 y

4. sudo mysql_secure_installation #初始化配置

5. 接下來會逐步選擇設定

   #1
   VALIDATE PASSWORD PLUGIN can be used to test passwords...
   Press y|Y for Yes, any other key for No: N (選擇`N` ,不會進行密碼的強校驗)
   
   #2
   Please set the password for root here...
   New password: (輸入密碼)
   Re-enter new password: (重複輸入)
   
   #3
   By default, a MySQL installation has an anonymous user,
   allowing anyone to log into MySQL without having to have
   a user account created for them...
   Remove anonymous users? (Press y|Y for Yes, any other key for No) : N (選擇`N`，不刪除匿名使用者)
   
   #4
   Normally, root should only be allowed to connect from
   'localhost'. This ensures that someone cannot guess at
   the root password from the network...
   Disallow root login remotely? (Press y|Y for Yes, any other key for No) : N (選擇`N`，允許root遠端連線)
   
   #5
   By default, MySQL comes with a database named 'test' that
   anyone can access...
   Remove test database and access to it? (Press y|Y for Yes, any other key for No) : N (選擇`N`，不刪除test資料庫)
   
   #6
   Reloading the privilege tables will ensure that all changes
   made so far will take effect immediately.
   Reload privilege tables now? (Press y|Y for Yes, any other key for No) : Y (選擇`Y`，修改許可權立即生效)
    
   

6. systemctl status mysql.service #檢查mysql服務狀態

7. 設定遠端訪問

   1. sudo vi /etc/mysql/mysql.conf.d/mysqld.cnf #找到 bind-address 修改值為 0.0.0.0(如果需要遠端訪問)

   2. sudo /etc/init.d/mysql restart #重啟mysql

   3. sudo mysql -uroot -p #輸入密碼進入mysql

   4. mysql>use mysql; #切換資料庫

   5. select host,user,plugin from user; #檢視狀態

   6. 如user為root的host為localhost

      時，則修改為%即可遠端連線，%是允許所有ip訪問

   #設定許可權與密碼
   mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '密碼'; #使用mysql_native_password修改加密規則
   mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '密碼' PASSWORD EXPIRE NEVER; #更新一下使用者的密碼
   mysql> UPDATE user SET host = '%' WHERE user = 'root'; #允許遠端訪問
   
   #重新整理cache中配置 重新整理許可權
   mysql>flush privileges; 
   mysql>quit;
    
   

   7. systemctl restart mysql.service #重啟mysql 服務

   8. 此時，即可使用navicat本地連線伺服器中的mysql了