雲伺服器Yum安裝mysql5 7並設定遠端訪問

1.按順序執行以下命令即可完成mysql的安裝

wget -i -c 

yum -y install mysql57-community-release-el7-10.noarch.rpm
yum -y install mysql-community-server

systemctl start  mysqld.service

systemctl enable mysqld

systemctl status mysqld.service

grep "password" /var/log/mysqld.log

mysql -uroot -p

mysql> set global validate_password_policy=0;

mysql> set global validate_password_length=1;

mysql> alter user 'root'@'localhost' identified by '自定義密碼';

mysql> use mysql;

mysql> update user set host='%' where user='root' and host='localhost';

mysql> select host,user from user;

+-----------+---------------+
| host | user |
+-----------+---------------+
| % | root |
| localhost | mysql.session |
| localhost | mysql.sys |
+-----------+---------------+

mysql>flush privileges

mysql> exit;

12.剛買的伺服器預設沒有啟動防火牆，如果啟動防火牆則需要在防火牆中開放3306埠

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