1 在官网下载mysql
2 下载完后解压，打开终端，输入
rpm -ivh mysql-community-common-8.2.0-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-plugins-8.2.0-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-8.2.0-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-8.2.0-1.el7.x86_64.rpm
rpm -ivh mysql-community-icu-data-files-8.2.0-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-8.2.0-1.el7.x86_64.rpm --nodeps
3 输入
cat /var/log/mysqld.log | grep password
获取密码
4 登录
输入 mysql -u -root -p登录mysql