我运行的是 Ubuntu 16.04 的 VPS（托管在 1&1）。我在尝试升级时遇到以下问题：
apt-get upgrade
返回结果如下：
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-4.4.0-72-generic : Depends: linux-image-4.4.0-72-generic but it is not installed
linux-image-generic : Depends: linux-image-4.4.0-72-generic but it is not installed
Recommends: thermald but it is not installed
E: Unmet dependencies. Try using -f.
我因此尝试：
apt-get -f install
返回：
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following packages were automatically installed and are no longer required:
linux-headers-4.4.0-57 linux-headers-4.4.0-57-generic linux-headers-4.4.0-59
linux-headers-4.4.0-59-generic linux-headers-4.4.0-62
linux-headers-4.4.0-62-generic linux-headers-4.4.0-63
linux-headers-4.4.0-63-generic linux-headers-4.4.0-64
linux-headers-4.4.0-64-generic linux-headers-4.4.0-66
linux-headers-4.4.0-66-generic linux-headers-4.4.0-67
linux-headers-4.4.0-67-generic linux-image-4.4.0-57-generic
linux-image-4.4.0-59-generic linux-image-4.4.0-62-generic
linux-image-4.4.0-63-generic linux-image-4.4.0-64-generic
linux-image-4.4.0-66-generic linux-image-4.4.0-67-generic
linux-image-extra-4.4.0-57-generic linux-image-extra-4.4.0-59-generic
linux-image-extra-4.4.0-62-generic linux-image-extra-4.4.0-63-generic
linux-image-extra-4.4.0-64-generic linux-image-extra-4.4.0-66-generic
linux-image-extra-4.4.0-67-generic
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
linux-image-4.4.0-72-generic
Suggested packages:
fdutils linux-doc-4.4.0 | linux-source-4.4.0 linux-tools
The following NEW packages will be installed:
linux-image-4.4.0-72-generic
0 upgraded, 1 newly installed, 0 to remove and 20 not upgraded.
8 not fully installed or removed.
Need to get 0 B/21.8 MB of archives.
After this operation, 66.4 MB of additional disk space will be used.
Do you want to continue? [Y/n] Y
(Reading database ... 406956 files and directories currently installed.)
Preparing to unpack .../linux-image-4.4.0-72-generic_4.4.0-72.93_amd64.deb ...
Done.
Unpacking linux-image-4.4.0-72-generic (4.4.0-72.93) ...
dpkg: error processing archive /var/cache/apt/archives/linux-image-4.4.0-72-generic_4.4.0-72.93_amd64.deb (--unpack):
cannot copy extracted data for './boot/vmlinuz-4.4.0-72-generic' to '/boot/vmlinuz-4.4.0-72-generic.dpkg-new': failed to write (No space left on device)
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/initramfs-tools 4.4.0-72-generic /boot/vmlinuz-4.4.0-72-generic
run-parts: executing /etc/kernel/postrm.d/zz-update-grub 4.4.0-72-generic /boot/vmlinuz-4.4.0-72-generic
Errors were encountered while processing:
/var/cache/apt/archives/linux-image-4.4.0-72-generic_4.4.0-72.93_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
我尝试自动删除软件包：
sudo apt autoremove
只得到这个：
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-4.4.0-72-generic : Depends: linux-image-4.4.0-72-generic but it is not installed
linux-image-generic : Depends: linux-image-4.4.0-72-generic but it is not installed
Recommends: thermald but it is not installed
E: Unmet dependencies. Try using -f.
我尝试删除个别包裹：
apt-get remove linux-headers-4.4.0-72-generic
但它不起作用：
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-headers-generic : Depends: linux-headers-4.4.0-72-generic but it is not going to be installed
linux-image-extra-4.4.0-72-generic : Depends: linux-image-4.4.0-72-generic but it is not going to be installed
linux-image-generic : Depends: linux-image-4.4.0-72-generic but it is not going to be installed
Recommends: thermald but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
所以，我的 /boot 分区已满，我找不到方法来腾出一些空间。
/dev/sda1 464M 456M 0 100% /boot
关于如何解决这个问题有什么想法吗？
编辑：
df -i给出：
Filesystem Inodes IUsed IFree IUse% Mounted on
udev 121341 451 120890 1% /dev
tmpfs 125929 611 125318 1% /run
/dev/mapper/vg00-lv01 3121152 446547 2674605 15% /
tmpfs 125929 1 125928 1% /dev/shm
tmpfs 125929 3 125926 1% /run/lock
tmpfs 125929 16 125913 1% /sys/fs/cgroup
/dev/sda1 124928 346 124582 1% /boot
tmpfs 125929 4 125925 1% /run/user/1000