VirtualBox 20.10 新错误:警告:字符设备 /dev/vboxdrv 不存在

VirtualBox 20.10 新错误:警告:字符设备 /dev/vboxdrv 不存在

VirtualBox 已在此 Ubuntu 主机上运行

现在do-release-upgrade从 20.04 到 20.10 之后它遇到了麻烦:

 sudo apt install linux-headers-$(uname -r)
 Reading package lists... Done
 Building dependency tree       
 Reading state information... Done
 linux-headers-5.8.0-31-generic is already the newest version (5.8.0-31.33).
 linux-headers-5.8.0-31-generic set to manually installed.
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 sudo apt install virtualbox virtualbox-dkms
 [sudo] password for stephen: 
 Reading package lists... Done
 Building dependency tree       
 Reading state information... Done
 virtualbox is already the newest version (6.1.14-dfsg-4).
 virtualbox-dkms is already the newest version (6.1.14-dfsg-4).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 stephen@acer:~$ vboxmanage list vms
 WARNING: The character device /dev/vboxdrv does not exist.
      Please install the virtualbox-dkms package and the appropriate
      headers, most likely linux-headers-generic. 

       You will not be able to start VMs until this problem is fixed.

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