產品型號：Thinkpad E15
系統版本：centos7
軟件版本：mysql 5.7
mysql安裝教程
1．使用yum安裝mysql數據庫的軟件包
[root@xuegod63 ~]# yum -y install mariadb-server mariadb
注：
mariadb-server #MariaDB數據庫
mariadb # MariaDB服務器Linux下客户端
注：從centos7系統開始，系統中自帶的mysql數據庫變成了mariadb-server，mariadb-server和mysql操作上一樣。mariadb-server是mysql的一個分支。
2．啟動數據庫服務
[root@xuegod63 ~]# systemctl start mariadb #啟動MariaDB服務
[root@xuegod63 ~]# systemctl enable mariadb #設置開啟自動啟動MariaDB服務
3. 安裝完mariadb-server後，運行mysql_secure_installation去除安全隱患
[root@xuegod63 ~]# mysql_secure_installation#進入安全配置導向
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!
In order to log into MySQL to secure it, we'll need the current
password for the root user. If you've just installed MySQL, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.
Enter current password for root (enter for none): #初次運行直接回車，因為root用户沒有密碼
OK, successfully used password, moving on…
Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.
Set root password? [Y/n] Y#是否設置root用户密碼,輸入Y
New password: 123456 #新密碼123456
Re-enter new password: 123456
Password updated successfully!
。。。
Remove anonymous users? [Y/n] Y #是否刪除匿名用户,生產環境建議刪除，所以直接回車或Y
... Success!
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? [Y/n] Y #是否禁止root遠程登錄,根據自己的需求選擇Y/n並回車,建議禁止
... Success!
By default, MariaDB comes with a database named 'test' that anyone can
access. This is also intended only for testing, and should be removed
before moving into a production environment.
Remove test database and access to it? [Y/n] Y #是否刪除test數據庫,直接回車或Y
- Dropping test database...
... Success!
- Removing privileges on test database...
... Success!
Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.
Reload privilege tables now? [Y/n] Y #是否重新加載權限表，直接回車
... Success!
Cleaning up...
All done! If you've completed all of the above steps, your MariaDB
installation should now be secure.
Thanks for using MariaDB!
… Success!
至此數據庫安裝成功。
4. 登錄數據庫
[root@xuegod63 ~]# mysql -u root -p123456
MariaDB [(none)]> show databases; #沒有test數據庫 #執行時，所有命令以；號結尾
+-------------------------+
| Database|
+-------------------------+
| information_schema|
| mysql|
| ucenter |
+-------------------------+
3 rows in set (0.00 sec)
MariaDB [(none)]> exit #退出命令可以加分號，也可以不加分號。
總結：
1、使用yum安裝mysql數據庫的軟件包
2、啟動數據庫服務
3、運行mysql_secure_installation去除安全隱患
4、登錄數據庫
