yum安裝配置MySQL數據庫

1.配置yum源

# 先安裝wget

yum install wget -y

 

 

2.下載mysql源安裝包

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

 

3.安裝數據庫

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

 

4.檢查mysql源是否安裝成功

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

yum install mysql-community-server -y

啟動MySQL服務
systemctl start mysqld
查看MySQL的啟動狀態
systemctl status mysqld

 

5.設置開機啟動

systemctl enable mysqld
systemctl daemon-reload    

 

6.修改數據庫修改root默認密碼

mysql安裝完成之后，在/var/log/mysqld.log文件中給root生成了一個默認密碼。

查看默認密碼

grep 'temporary password' /var/log/mysqld.log

 

其中 jIDqgfoE-2KZ 就是我的默認密碼

登陸數據庫 
mysql -uroot -p
修改默認密碼
mysql> SET PASSWORD = PASSWORD('Lenovo@123');
Lenvoo@123是你的新密碼
如何解決ERROR 1819 (HY000): Your password does not satisfy the current policy requirements呢？ 這里直接提供解決方案文末有詳細的說明
必須修改兩個全局參數：
首先，修改validate_password_policy參數的值
set global validate_password_policy=0;
再修改密碼的長度
set global validate_password_length=1;
再次執行修改密碼就可以了
ALTER USER 'root'@'localhost' IDENTIFIED BY 'Lenovo@123';

***********允許root遠程登陸**********
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'Lenovo@123' WITH GRANT OPTION;
 
退出數據庫