卸載原有mysql
檢查是否已經安裝Mysql
rpm -qa | grep mysql
卸載已經安裝的Mysql
## 刪除mysql相關目錄
find / -name mysql |xargs rm -rf
安裝新的mysql
安裝yum源
yum localinstall mysql57-community-release-el7-8.noarch.rpm
安裝mysql服務
yum install -y mysql-community-server
檢查mysql安裝結果
[root@baimaduhe src]# mysql -V
mysql Ver 14.14 Distrib 5.7.29, for Linux (x86_64) using EditLine wrapper
啓動Mysql 服務
systemctl start mysqld
設置Mysql 開機啓動
systemctl start mysqld
獲取Mysql 初始密碼
[root@baimaduhe src]# grep 'temporary password' /var/log/mysqld.log
2020-01-17T15:12:08.755778Z 1 [Note] A temporary password is generated for root@localhost: ;QsQkdLBl6kR
連接到mysql
[root@baimaduhe src]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.29
Copyright (c) 2000, 2020, 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>
配置mysql
將密碼強度設置爲低
學習用爲了方便才這樣設置，生產環境請勿這樣設置
set global validate_password_policy=LOW;
修改mysql
mysql> ALTER USER USER() IDENTIFIED BY 'new_password';
允許遠程訪問
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;
刷新配置
FLUSH PRIVILEGES;
遠程登錄mysql
mycli -u root -p<your_password> -h <service ip> -P 3306
參考資料
- https://www.cnblogs.com/123hll/p/9633422.html
- https://blog.csdn.net/muziljx/article/details/81541896
- https://www.mysql.com/
