CentOS 7安装MySQL 5.7

卸载CentOS自带的mariadb：

rpm -qa | grep mariadb

rpm -e --nodeps mariadb-server-5.5.68-1.el7.x86_64 mariadb-5.5.68-1.el7.x86_64 mariadb-libs-5.5.68-1.el7.x86_64

安装MySQL：

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

rpm -ivh mysql57-community-release-el7-8.noarch.rpm

cd /etc/yum.repos.d/

yum -y install mysql-server

rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022

yum -y install mysql-server

启动MySQL

systemctl start mysqld

登录：

mysql -u root -p