查詢並確定自己需要安裝的版本

brew search mysql

==> Formulae
automysqlbackup            mysql-connector-c          mysql@5.5
mysql                                mysql-connector-c++        mysql@5.6
mysql++                           mysql-sandbox              mysql@5.7 ✔
mysql-client                    mysql-search-replace       mysqltuner
mysql-cluster                  mysql-utilities

==> Casks
mysql-connector-python     mysql-utilities            navicat-for-mysql
mysql-shell                mysqlworkbench             sqlpro-for-mysql
 

安裝[email protected]

#指定版本安裝
brew install mysql@5.7

#配置環境變數
echo 'export PATH="/usr/local/opt/[email protected]/bin:$PATH"' >> ~/.bash_profile
source ~/.bash_profile

#啟動服務
mysql.server start
brew services start mysql@5.7

#初始化，設定密碼
mysql_secure_installation

[root@zhangMySQL5711 bin]# mysql_secure_installation            
Enter password: 

Securing the MySQL server deployment.


VALIDATE PASSWORD PLUGIN can be used to test passwords                        //密碼驗證外掛，為了提高安全性，需要驗證密碼
and improve security. It checks the strength of password                      // 它會檢查密碼的強度
and allows the users to set only those passwords which are                    //只允許使用者設定足夠安全的密碼
secure enough. Would you like to setup VALIDATE PASSWORD plugin?              //提示安裝密碼驗證外掛

Press y|Y for Yes, any other key for No: y

There are three levels of password validation policy:                      //三個等級的驗證策略

LOW Length >= 8                                                             //最小長度大於等於8個字元
MEDIUM Length >= 8, numeric, mixed case, and special characters             //數字，字母，特殊字元 混合，具體的應該是至少1個數字，1個字母，1個特殊字元，長度不超過32個字元
STRONG Length >= 8, numeric, mixed case, special characters and dictionary file   //  最嚴格，加上了，字典檔案

Please enter 0 = LOW, 1 = MEDIUM and 2 = STRONG: 2                      //這裡我選擇2 MEDIUM
Using existing password for root.

Estimated strength of the password: 50                                   //這裡也是密碼強度的評級
Change the password for root ? ((Press y|Y for Yes, any other key for No) : y

New password:                                                        //密碼 

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) : y     //提示要使用剛剛輸入的密碼嗎？
 ... Failed! Error: Your password does not satisfy the current policy requirements                   //外掛驗證不通過，不符合當前安全要求級別

New password:                                                        //密碼

Re-enter new password: 

Estimated strength of the password: 100 
Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No) : y
By default, a MySQL installation has an anonymous user,               //預設情況下，MySQL有一個匿名使用者，
allowing anyone to log into MySQL without having to have              //這個匿名使用者，不必有一個使用者為他們建立，匿名使用者允許任何人登入到MySQL，
a user account created for them. This is intended only for            //這只是為了方便測試使用
testing, and to make the installation go a bit smoother.
You should remove them before moving into a production                //在正式環境使用的時候，建議你移除它
environment.

Remove anonymous users? (Press y|Y for Yes, any other key for No) : y                //提示移除匿名使用者
Success.

Normally, root should only be allowed to connect from                        //一般情況下，root使用者只允許使用"localhost"方式登入，
'localhost'. This ensures that someone cannot guess at                       // 以此確保，不能被某些人通過網路的方式訪問
the root password from the network.

Disallow root login remotely? (Press y|Y for Yes, any other key for No) : n          //

 ... skipping.
By default, MySQL comes with a database named 'test' that                      //預設情況下，MySQL資料庫中有一個任何使用者都可以訪問的test庫，
anyone can access. This is also intended only for testing,                     //這也僅僅是為了測試
and should be removed before moving into a production                          // 在正式環境下，應該移除掉
environment.


Remove test database and access to it? (Press y|Y for Yes, any other key for No) : y
 - Dropping test database...
Success.

 - Removing privileges on test database...
Success.

Reloading the privilege tables will ensure that all changes                           //重新整理許可權表，以確保所有的修改可以立刻生效
made so far will take effect immediately.

Reload privilege tables now? (Press y|Y for Yes, any other key for No) : y
Success.

All done!