参考资料:
VirtualBox 官方地址
不啰嗦：
cd /etc/yum.repos.d/sudo wget https://download.virtualbox.org/virtualbox/rpm/el/virtualbox.repoyum update -y && yum install -y VirtualBox-6.0验证执行：(检查每一步是否正确)
[centos@ip-172-26-0-234 ~]$ cd /etc/yum.repos.d/[centos@ip-172-26-0-234 yum.repos.d]$ lsCentOS-Base.repo CentOS-CR.repo CentOS-Debuginfo.repo CentOS-fasttrack.repo CentOS-Media.repo CentOS-Sources.repo CentOS-Vault.repo epel-7.repo[centos@ip-172-26-0-234 yum.repos.d]$ sudo wget https://download.virtualbox.org/virtualbox/rpm/el/virtualbox.repo--2019-06-13 10:07:25-- https://download.virtualbox.org/virtualbox/rpm/el/virtualbox.repoResolving download.virtualbox.org (download.virtualbox.org)... 104.103.44.231Connecting to download.virtualbox.org (download.virtualbox.org)|104.103.44.231|:443... connected.HTTP request sent, awaiting response... 200 OKLength: 259 [text/plain]Saving to: ‘virtualbox.repo’100%[===========================================================================================================================>] 259 --.-K/s in 0s 2019-06-13 10:07:27 (42.6 MB/s) - ‘virtualbox.repo’ saved [259/259][centos@ip-172-26-0-234 yum.repos.d]$ lsCentOS-Base.repo CentOS-Debuginfo.repo CentOS-Media.repo CentOS-Vault.repo virtualbox.repoCentOS-CR.repo CentOS-fasttrack.repo CentOS-Sources.repo epel-7.repo[centos@ip-172-26-0-234 yum.repos.d]$ yum update -y[centos@ip-172-26-0-234 yum.repos.d]$ yum search VirtualBox-6.0[centos@ip-172-26-0-234 yum.repos.d]$ yum install VirtualBox-6.0