第一步，下載MySQL安裝
[root@localhost ~]# cd /home/data/
[root@localhost data]# ls
get-docker.sh nginx-1.10.1 nginx-1.10.1.tar.gz redis-5.0.3 redis-5.0.3.tar.gz server-jre-8u131-linux-x64.tar.gz zookeeper-3.4.10.tar.gz
[root@localhost data]# wget https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm
如果提示wget命令不存在，先執行
yum -y install wget
下載完成後
多了一個mysql57-xxx的文件，這個就是mysql安裝源
安裝mysql安裝源
[root@localhost data]# yum -y localinstall mysql57-community-release-el7-11.noarch.rpm
第二步，在線安裝MySQL
[root@localhost data]# yum -y install mysql-community-server
下載的東西有點多，需要等待一會
第三步，啓動MySQL服務
[root@localhost data]# systemctl start mysqld
第四步，設置開機啓動
[root@localhost data]# systemctl enable mysqld
[root@localhost data]# systemctl daemon-reload
第五步，修改root登錄密碼
mysql安裝完成之後，會在/var/log/mysqld.log文件中給root生成了一個臨時的默認密碼。
[root@localhost data]# vim /var/log/mysqld.log
複製此密碼，使用此密碼登錄root
[root@localhost data]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.25
Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'Test2016@';
Query OK, 0 rows affected (0.01 sec)
mysql5.7默認密碼策略要求密碼必須是大小寫字母數字特殊字母的組合，至少8位
# mysql -uroot -ppassw0rd
mysql> SHOW VARIABLES LIKE 'validate_password%';
+--------------------------------------+--------+
| Variable_name | Value |
+--------------------------------------+--------+
| validate_password_check_user_name | OFF |
| validate_password_dictionary_file | |
| validate_password_length | 4 |
| validate_password_mixed_case_count | 1 |
| validate_password_number_count | 1 |
| validate_password_policy | MEDIUM |
| validate_password_special_char_count | 1 |
+--------------------------------------+--------+
7 rows in set (0.00 sec)
mysql> set global validate_password_policy=0;
Query OK, 0 rows affected (0.00 sec)
mysql> set global validate_password_length=4;
Query OK, 0 rows affected (0.00 sec)
mysql> \q
第六步，設置允許遠程登錄
mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'Test2016@' WITH GRANT OPTION;
Query OK, 0 rows affected, 1 warning (0.00 sec)
第七步，退出
mysql> exit
Bye
第八步，防火牆開放3306端口
[root@localhost data]# firewall-cmd --zone=public --add-port=3306/tcp --permanent
success
[root@localhost data]# firewall-cmd --reload
success
[root@localhost data]#
第九步，配置mysql默認編碼爲utf-8
修改/etc/my.cnf配置文件，在[mysqld]下添加編碼配置
character_set_server=utf8
init_connect='SET NAMES utf8'
:wq!保存退出
第十步，重啓MySQL
[root@localhost data]# systemctl restart mysqld
第十一步，登錄root用戶查看編碼
第十二步，測試遠程連接
