我正在运行 Ubuntu 20.04LTS。当我在我的包中搜索 virtualbox 时，它会显示一些包。
~$ 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 virtualbox-dkms
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package 'virtualbox-dkms' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
---
~$ sudo apt-get remove virtualbox-source
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package 'virtualbox-source' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
---
~$ sudo apt-get remove virtualbox-guest*
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'virtualbox-guest-utils' for glob 'virtualbox-guest*'
Note, selecting 'virtualbox-guest-modules' for glob 'virtualbox-guest*'
Note, selecting 'virtualbox-guest-additions-iso' for glob 'virtualbox-guest*'
Note, selecting 'virtualbox-guest-dkms' for glob 'virtualbox-guest*'
Note, selecting 'virtualbox-guest-dkms-hwe' for glob 'virtualbox-guest*'
Note, selecting 'virtualbox-guest-modules-hwe' for glob 'virtualbox-guest*'
Note, selecting 'virtualbox-guest-x11-hwe' for glob 'virtualbox-guest*'
Note, selecting 'virtualbox-guest-source' for glob 'virtualbox-guest*'
Note, selecting 'virtualbox-guest-source-hwe' for glob 'virtualbox-guest*'
Note, selecting 'virtualbox-guest-utils-hwe' for glob 'virtualbox-guest*'
Note, selecting 'virtualbox-guest-x11' for glob 'virtualbox-guest*'
Package 'virtualbox-guest-modules-hwe' is not installed, so not removed
Package 'virtualbox-guest-additions-iso' is not installed, so not removed
Package 'virtualbox-guest-dkms' is not installed, so not removed
Package 'virtualbox-guest-dkms-hwe' is not installed, so not removed
Package 'virtualbox-guest-source' is not installed, so not removed
Package 'virtualbox-guest-source-hwe' is not installed, so not removed
Package 'virtualbox-guest-utils' is not installed, so not removed
Package 'virtualbox-guest-utils-hwe' is not installed, so not removed
Package 'virtualbox-guest-x11' is not installed, so not removed
Package 'virtualbox-guest-x11-hwe' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
有人可以帮我理解这里发生了什么吗？我对Linux相当陌生。喜欢它，但仍然对这些事情感到困惑。谢谢！
更新：使用时我得到不同的结果dpkg，apt list如下所示：
~$ dpkg --list | grep -i virtualbox
rc virtualbox 6.1.10-dfsg-1~ubuntu1.20.04.1 amd64 x86 virtualization solution - base binaries
rc virtualbox-qt 6.1.10-dfsg-1~ubuntu1.20.04.1 amd64 x86 virtualization solution - Qt based user interface
~$ apt list --installed | grep virtualbox
WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
apt list | grep virtualbox列出您的软件源中可以使用 apt 安装的可用软件包。您需要运行以下命令来列出当前使用 apt 安装的软件包：请注意，如果您尝试使用 apt-get 而不是 apt 运行此命令，则会返回错误消息。
此命令将返回较短的软件包列表，因为结果
sudo apt remove virtualbox-dkms virtualbox-source virtualbox-guest*显示结果中列出的许多软件包当前未安装。结果
dpkg --list | grep -i virtualbox显示这两个包是手动安装的：virtualbox和virtualbox-qt。您可以使用以下命令卸载这两个包：选择要清除的包（即，我们要从系统目录中删除所有内容，甚至是配置文件）。如果您打算安装更新版本的 VirtualBox，这将是一个很好的运行命令。