Centos7 在线安装 Mysql5.7

1. Install MySQL and the MySQL community server, and start the MySQL service:

   yum localinstall \
   https://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
   
   yum install mysql-community-server
   
   systemctl start mysqld.service
   

2. Obtain the randomly generated MySQL root password.

   grep 'A temporary password is generated for root@localhost' \
   /var/log/mysqld.log |tail -1
   

3. Reset the MySQL root password. Enter the following command. You are prompted for the password you obtained in the previous step. MySQL then asks you to change the password.

   /usr/bin/mysql_secure_installation
   

   grant all privileges on *.* to root@'%' identified by 'xxxxxxx' with grant option;
   flush privileges;
   mysql -uroot -p