https://www.cnblogs.com/ttrrpp/p/12173562.html
參考：
https://blog.csdn.net/qq_39038465/article/details/81663540
https://blog.csdn.net/qq_41525746/article/details/109995429?utm_medium=distribute.pc_relevant.none-task-blog-baidujs_title-0&spm=1001.2101.3001.4242
https://blog.csdn.net/huryer/article/details/106608119
https://www.jb51.net/article/186499.htm
https://blog.csdn.net/weixin_40780777/article/details/100553505
1、下載rpm包，安裝Yum Repository
wget https://dev.mysql.com/get/mysql80-community-release-el8-1.noarch.rpm
2、使用rpm來安裝MySQL
yum install mysql80-community-release-el8-1.noarch.rpm
3、使用yum安裝mysql服務
yum repolist enabled | grep "mysql.*-community.*"
rpm -ivh mysql80-community-release-el8-1.noarch.rpm
第二次安裝遇到問題，沒有像上面那樣安裝，而是出現了一個錯誤，如下：
package mysql80-community-release-el8-1.noarch is already installed
可以參考此鏈接，https://www.cnblogs.com/xueyongzhi/p/13517991.html進入到yum安裝目錄下再安裝
3. 使用yum安裝mysql-server
cd /etc/yum.repos.d/
yum install mysql-server
|
4、查看mysql狀態 systemctl list-unit-files|grep mysqld
systemctl enable mysqld.service
ps -ef|grep mysql
5、獲取臨時密碼：grep 'temporary password' /var/log/mysql/mysqld.log
注意這個地方的路徑，跟網絡搜到的不一致，目錄多了個mysql
6、發現臨時密碼不存在，需要初始化：mysqld：mysqld --initialize --user=mysql
然后再獲取臨時密碼即可得到：grep 'temporary password' /var/log/mysql/mysqld.log
7、登錄mysql：
mysql -u root -p回車輸入密碼后報錯：
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
各種看都試了，最后看下面連接
https://www.cnblogs.com/wangpingcong/p/14000678.html
原來是服務沒有啟動，運行systemctl start mysqld.service命令，看到下圖active(running)再登錄就好了
8、接下來就是修改默認密碼，開始操作數據庫吧！！！！！