在 14.04 上使用 apt-get 将内核从 3.10 升级到 4.2 时，升级因出现错误消息而停止。运行时出现相同的错误消息：
$ sudo apt-get upgrade
这是错误：
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following package was automatically installed and is no longer required:
busybox-static
Use 'apt-get autoremove' to remove it.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Setting up initramfs-tools (0.103ubuntu4.6) ...
update-initramfs: deferring update (trigger activated)
Processing triggers for initramfs-tools (0.103ubuntu4.6) ...
update-initramfs: Generating /boot/initrd.img-4.2.0-42-generic
Warning: root device does not exist
Press Ctrl-C to abort build, or Enter to continue
Unsupported platform.
run-parts: /etc/initramfs/post-update.d//flash-kernel exited with return code 1
dpkg: error processing package initramfs-tools (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
initramfs-tools
E: Sub-process /usr/bin/dpkg returned an error code (1)
编辑：我仍然可以充分使用我的系统，并且可以正常启动。问题似乎是升级到 4.2 失败，现在我无法运行 apt-get upgrade，因为它会告诉我根设备不存在
编辑：尝试删除软件包：
$ sudo apt-get --purge autoremove
E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem.
$ sudo dpkg --configure -a
Setting up initramfs-tools (0.103ubuntu4.6) ...
update-initramfs: deferring update (trigger activated)
Processing triggers for initramfs-tools (0.103ubuntu4.6) ...
update-initramfs: Generating /boot/initrd.img-4.2.0-41-generic
Warning: root device does not exist
跑步：
$ sudo update-initramfs -c -k 4.2.0-41-generic
update-initramfs: Generating /boot/initrd.img-4.2.0-41-generic
Warning: root device does not exist