安装mysql8.0

卸载MariaDB
rpm -qa | grep mariadb rpm -e *mariadb-libs-5.5.68-1.el7.x86_64* rpm -qa | grep mariadb

在MySQL官网中获取YUM源rpm包地址
https://dev.mysql.com/downloads/repo/yum/

更新YUM源
wget https://dev.mysql.com/get/mysql80-community-release-el7-6.noarch.rpm

yum localinstall mysql80-community-release-el7-6.noarch.rpm yum clean all yum makecache

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

安装mysql
yum install mysql-community-server

编辑配置
vi /etc/my.cnf

启动mysql
systemctl start mysqld

查看初始登录密码
cat /var/log/mysqld.log | grep password

登录
mysql -uroot -p

修改密码
ALTER USER 'root'@'localhost' IDENTIFIED BY 'YOUR_PASSWORD';
FLUSH PRIVILEGES;

设置自动启动
systemctl enable mysqld