我似乎无法可靠地安装 linux 虚拟内核（用于 VM）。这些软件包安装得很好，但它们只是空的，除了 usr/share/doc 中的更改日志和版权文件之外没有任何东西。
在 Ubuntu 14.04 trusty 上安装 -virtual 内核的正确程序是什么？或者整个事情现在都被弃用了？
谢谢
以供参考：
root@s2:/boot/grub# dpkg -L linux-virtual
/.
/usr
/usr/share
/usr/share/doc
/usr/share/doc/linux-virtual
/usr/share/doc/linux-virtual/copyright
/usr/share/doc/linux-virtual/changelog.gz
root@s2:/boot/grub# dpkg -L linux-image-virtual
/.
/usr
/usr/share
/usr/share/doc
/usr/share/doc/linux-image-virtual
/usr/share/doc/linux-image-virtual/copyright
/usr/share/doc/linux-image-virtual/changelog.gz
root@s2:/boot/grub# dpkg -L linux-image-extra-virtual
/.
/usr
/usr/share
/usr/share/doc
/usr/share/doc/linux-image-extra-virtual
/usr/share/doc/linux-image-extra-virtual/copyright
/usr/share/doc/linux-image-extra-virtual/changelog.gz
root@s2:/boot/grub# dpkg -L linux-headers-virtual
/.
/usr
/usr/share
/usr/share/doc
/usr/share/doc/linux-headers-virtual
/usr/share/doc/linux-headers-virtual/copyright
/usr/share/doc/linux-headers-virtual/changelog.gz
root@s2:/boot/grub# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.1 LTS
Release: 14.04
Codename: trusty