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我正在尝试按照以下步骤将 Plex Media Server 安装到我的 Ubuntu 服务器（14.04.2 LTS）指导但是当我安装 Docker 时，运行命令时出现以下问题sudo apt-get install linux-image-extra-$(uname -r)：
$ sudo apt-get install linux-image-extra-$(uname -r)
Reading package lists... Done
Building dependency tree
Reading state information... Done
linux-image-extra-3.13.0-53-generic is already the newest version.
linux-image-extra-3.13.0-53-generic set to manually installed.
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
linux-image-extra-3.13.0-68-generic : Depends: linux-image-3.13.0-68-generic but it is not going to be installed
linux-image-generic : Depends: linux-image-3.13.0-68-generic but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
然后，当我尝试运行该命令时apt-get -f install出现以下错误：
$ sudo apt-get -f install
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-3.13.0-48 linux-headers-3.13.0-48-generic
linux-headers-3.13.0-54 linux-headers-3.13.0-54-generic
linux-image-3.13.0-48-generic linux-image-3.13.0-54-generic
linux-image-extra-3.13.0-48-generic linux-image-extra-3.13.0-54-generic
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
linux-image-3.13.0-68-generic
Suggested packages:
fdutils linux-doc-3.13.0 linux-source-3.13.0 linux-tools
The following NEW packages will be installed:
linux-image-3.13.0-68-generic
0 upgraded, 1 newly installed, 0 to remove and 205 not upgraded.
9 not fully installed or removed.
Need to get 0 B/15.2 MB of archives.
After this operation, 42.5 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 316302 files and directories currently installed.)
Preparing to unpack .../linux-image-3.13.0-68-generic_3.13.0-68.111_amd64.deb ...
Done.
Unpacking linux-image-3.13.0-68-generic (3.13.0-68.111) ...
dpkg: error processing archive /var/cache/apt/archives/linux-image-3.13.0-68-generic_3.13.0-68.111_amd64.deb (--unpack):
cannot copy extracted data for './boot/System.map-3.13.0-68-generic' to '/boot/System.map-3.13.0-68-generic.dpkg-new': failed to write (No space left on device)
No apport report written because the error message indicates a disk full error
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 3.13.0-68-generic /boot/vmlinuz-3.13.0-68-generic
run-parts: executing /etc/kernel/postrm.d/zz-update-grub 3.13.0-68-generic /boot/vmlinuz-3.13.0-68-generic
Errors were encountered while processing:
/var/cache/apt/archives/linux-image-3.13.0-68-generic_3.13.0-68.111_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
现在，通过阅读错误消息，我知道/boot/驱动器已满，而且看起来$ df -h确实已满。但是清空驱动器的最佳方法是什么，或者我是否可以将其移动/boot/到更大的分区而不影响主驱动器上的所有文件？
**更新**
我的输出如下df -h：
$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/ubuntu--vg-root 1.8T 1.5T 256G 86% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
udev 968M 8.0K 968M 1% /dev
tmpfs 196M 1.2M 195M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 980M 4.0K 980M 1% /run/shm
none 100M 0 100M 0% /run/user
/dev/sda1 236M 230M 0 100% /boot
这是我的输出dpkg -l 'linux-image*' | grep ^ii：
$ dpkg -l 'linux-image*' | grep ^ii
ii linux-image-3.13.0-43-generic 3.13.0-43.72 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii linux-image-3.13.0-46-generic 3.13.0-46.79 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii linux-image-3.13.0-48-generic 3.13.0-48.80 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii linux-image-3.13.0-49-generic 3.13.0-49.83 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii linux-image-3.13.0-51-generic 3.13.0-51.84 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii linux-image-3.13.0-52-generic 3.13.0-52.86 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii linux-image-3.13.0-53-generic 3.13.0-53.89 amd64 Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii linux-image-extra-3.13.0-43-generic 3.13.0-43.72 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii linux-image-extra-3.13.0-46-generic 3.13.0-46.79 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii linux-image-extra-3.13.0-48-generic 3.13.0-48.80 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii linux-image-extra-3.13.0-49-generic 3.13.0-49.83 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii linux-image-extra-3.13.0-51-generic 3.13.0-51.84 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii linux-image-extra-3.13.0-52-generic 3.13.0-52.86 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii linux-image-extra-3.13.0-53-generic 3.13.0-53.89 amd64 Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
答案1
您的 /boot 目录已满！查找并删除不再使用的旧内核（apt-get purge linux-image-3.13.0-43-generic）。为什么有这么多？只需保留几个备用内核和一个新的内核即可。这也会缩短您的启动列表。
答案2
按照 askubuntu.com 上的指南解决了我的问题：
→释放 /boot 文件系统上的空间 （显然在需要时将相关值替换为我自己的）
按照上述指南后，我运行了命令apt-get autoremove，清理了 /boot 分区上的一大堆空间。
现在我可以apt-get -f install再次运行该命令。