我收到一条错误消息，说明我的 /boot 已满。由于磁盘已满错误或依赖项错误，尝试清理旧图像文件似乎总是失败。有人可以解释我哪里出错了。
$ sudo apt-get autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run ‘apt-get -f install’ to correct these.
The following packages have unmet dependencies.
linux-image-extra-3.13.0-44-generic : Depends: linux-image-3.13.0-44-generic but it is not installed
linux-image-extra-3.13.0-45-generic : Depends: linux-image-3.13.0-45-generic but it is not installed
linux-image-generic : Depends: linux-image-3.13.0-45-generic but it is not installed
E: Unmet dependencies. Try using -f.
$ ls /boot
abi-3.13.0-32-generic initrd.img-3.13.0-43-generic
abi-3.13.0-36-generic lost+found
abi-3.13.0-37-generic memtest86+.bin
abi-3.13.0-39-generic memtest86+.elf
abi-3.13.0-40-generic …