我有virtualbox，我不记得我是怎么下载的。我想更新，所以我要删除这个版本。要使用我的虚拟机，我输入virtualbox终端，但是当我输入时，sudo apt-get remove virtualbox它说；
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package 'virtualbox' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
那我该怎么卸载呢？