在看似部分内核升级后，Apt 无法升级或安装新软件包。我试过apt-get purge -f linux-image-extra-3.19.0-22-generic失败并显示非常相似的错误消息。机器在启动到最新内核版本时也会崩溃（grub 中的默认版本），但以前的版本工作正常。
$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages will be REMOVED:
linux-image-3.19.0-22-generic linux-image-extra-3.19.0-22-generic
The following packages will be upgraded:
linux-cloud-tools-common
1 upgraded, 0 newly installed, 2 to remove and 0 not upgraded.
2 not fully installed or removed.
Need to get 0 B/24.3 kB of archives.
After this operation, 208 MB disk space will be freed.
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