VitrualBox官網：https://www.virtualbox.org/
在線用戶手冊：https://www.virtualbox.org/manual/
在線安裝說明：https://www.virtualbox.org/wiki/Linux_Downloads
本文安裝步驟參考VitrualBox官網安裝說明，軟件當前版本爲6.1。安裝VirtualBox需要用到的命令：sudo, wget, apt-key, apt-get。若是root用戶登陸進行安裝，去掉命令行中的sudo命令。
第一步：添加virtualbox deb源：
deb [arch=amd64] https://download.virtualbox.org/virtualbox/debian buster contrib
markul@server:~# sudo vi /etc/apt/sources.list
markul@server:~# sudo cat /etc/apt/sources.list
deb http://mirrors.163.com/debian/ buster main non-free contrib
deb http://security.debian.org/debian-security buster/updates main contrib non-free
deb http://mirrors.163.com/debian/ buster-updates main contrib non-free
deb-src http://mirrors.163.com/debian/ buster main non-free contrib
deb-src http://security.debian.org/debian-security buster/updates main contrib non-free
deb-src http://mirrors.163.com/debian/ buster-updates main contrib non-free
deb [arch=amd64] https://download.virtualbox.org/virtualbox/debian buster contrib
第二步：下載和添加 Oracle的apt-secure公鑰文件:
markul@server:~# wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add -
markul@server:~# wget -q https://www.virtualbox.org/download/oracle_vbox.asc -O- | sudo apt-key add -
第三步：安裝virtualbox6.1版本：
#更新源
markul@server:~# sudo apt-get update
#安裝virtualbox-6.1版本
markul@server:~# sudo apt-get install virtualbox-6.1
#查看已經安裝的virtualbox版本號
markul@server:~# sudo VBoxManage -v
6.1.4r136177