1.下載mysql源安裝包

# wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm

2.安裝mysql源

# yum localinstall mysql57-community-release-el7-8.noarch.rpm

3. 檢查mysql源是否安裝成功

# yum repolist enabled | grep "mysql.*-community.*"

4.修改mysql-community.repo源

# vi /etc/yum.repos.d/mysql-
 
community.repo

比如要安裝5.6版本，將5.7源的enabled=1改成enabled=0。然後再將5.6源的enabled=0改成enabled=1即可。

5. 安裝MySQL

# yum install mysql-community-server

6.啟動MySQL服務

# systemctl start mysqld

7.檢視MySQL的啟動狀態

# systemctl status mysqld

8.開機啟動

# systemctl enable mysqld
# systemctl daemon-reload

9. 登陸到mysql,修改root本地登入密碼

# mysql -uroot -p
mysql>use mysql
mysql>set password for 'root'@'localhost'=password('yourpassword');
mysql>flush privileges;

10.退出mysql

mysql>exit

11. 重啟mysql

# systemctl restart mysqld

12.新增遠端登入使用者

mysql> use mysql;
mysql> GRANT ALL PRIVILEGES
 
 ON *.* TO 'root'@'%' IDENTIFIED BY 'yourpassword' WITH GRANT OPTION;
mysql> flush privileges;

13.設定預設編碼為UTF-8忽略表名大小寫

# vi /etc/my.cnf

在[mysqld]下新增下面三行程式碼
character-set-server=utf8
collation-server=utf8_general_ci
lower_case_table_names=1