我运行的是 Ubuntu 20.04LTS。当我在包中搜索 virtualbox 时，它显示了许多包。
~$ apt list | grep virtualbox
WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
boinc-virtualbox/focal 7.16.6+dfsg-1 amd64
unity-scope-virtualbox/focal,focal 0.1+13.10.20130723-0ubuntu2 all
virtualbox-dkms/focal-updates 6.1.10-dfsg-1~ubuntu1.20.04.1 amd64
virtualbox-ext-pack/focal-updates,focal-updates 6.1.10-1~ubuntu1.20.04.1 all
virtualbox-guest-additions-iso/focal-updates,focal-updates 6.1.10-1~ubuntu1.20.04.1 all
virtualbox-guest-dkms-hwe/focal-updates,focal-updates 6.1.10-dfsg-1~ubuntu1.20.04.1 all
virtualbox-guest-dkms/focal-updates,focal-updates 6.1.10-dfsg-1~ubuntu1.20.04.1 all
virtualbox-guest-source-hwe/focal-updates,focal-updates 6.1.10-dfsg-1~ubuntu1.20.04.1 all
virtualbox-guest-source/focal-updates,focal-updates 6.1.10-dfsg-1~ubuntu1.20.04.1 all
virtualbox-guest-utils-hwe/focal-updates 6.1.10-dfsg-1~ubuntu1.20.04.1 amd64
virtualbox-guest-utils/focal-updates 6.1.10-dfsg-1~ubuntu1.20.04.1 amd64
virtualbox-guest-x11-hwe/focal-updates 6.1.10-dfsg-1~ubuntu1.20.04.1 amd64
virtualbox-guest-x11/focal-updates 6.1.10-dfsg-1~ubuntu1.20.04.1 amd64
virtualbox-qt/focal-updates,now 6.1.10-dfsg-1~ubuntu1.20.04.1 amd64 [residual-config]
virtualbox-source/focal-updates 6.1.10-dfsg-1~ubuntu1.20.04.1 amd64
virtualbox/focal-updates,now 6.1.10-dfsg-1~ubuntu1.20.04.1 amd64 [residual-config]
但是，当我尝试删除其中任何一个时，它表示该软件包未安装，因此未删除。
$ sudo apt-get remove …