不能清理/boot文件夹， Unmet dependencies 错误

1. 方法参考：https://askubuntu.com/questions/585736/cant-clean-a-full-boot-because-of-unmet-dependencies
2. Ubuntu 系统在一次次升级的过程中，会在 /boot 文件夹中积累多个内核文件。如图，经过多次更新后，/boot 文件夹中保存了许多内核及相关文件
3. 先看一下磁盘使用情况，
4. $ df
   Filesystem      1K-blocks       Used  Available Use% Mounted on
   udev             12272772          0   12272772   0% /dev
   tmpfs             2458640      32896    2425744   2% /run
   /dev/sdd9        39241336   25862116   11362812  70% /
   tmpfs            12293196        248   12292948   1% /dev/shm
   tmpfs                5120          4       5116   1% /run/lock
   tmpfs            12293196          0   12293196   0% /sys/fs/cgroup
   /dev/sda       2884154032 2526650972  210973348  93% /Backup
   /dev/sdb       5814216808 3493903032 2027271264  64% /Seq_data
   /dev/sdd8          369639     354747          0 100% /boot
   /dev/sdd10       98299524    5910048   87373108   7% /home
   /dev/sdd4       104857596     385000  104472596   1% /win10/Tools
   /dev/sdd12      393592316  336866044   36709888  91% /wd
   /dev/sdd3        62916396   56366304    6550092  90% /win10/OS
   /dev/sdd11       98299524   73378448   19904708  79% /opt
   /dev/sdd1          507904      41312     466592   9% /boot/efi
   /dev/sdd13      341272432  103292216  220621472  32% /share
   /dev/sdd5       786430972  396949324  389481648  51% /win10/seq_data
   tmpfs             2458640         92    2458548   1% /run/user/1000
5. 使用 byobu 命令行工具安装后，继续在命令提示符后输入：sudo purge-old-kernels出现如下信息：
6. $  sudo purge-old-kernels
7. Building dependency tree
8. 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-4.4.0-101-generic : Depends: linux-image-4.4.0-101-generic but it is not going to be installed
    linux-image-extra-4.4.0-103-generic : Depends: linux-image-4.4.0-103-generic but it is not going to be installed
    linux-image-extra-4.4.0-112-generic : Depends: linux-image-4.4.0-112-generic but it is not going to be installed
    linux-image-extra-4.4.0-97-generic : Depends: linux-image-4.4.0-97-generic but it is not going to be installed
    linux-image-extra-4.4.0-98-generic : Depends: linux-image-4.4.0-98-generic but it is not going to be installed
    linux-image-generic : Depends: linux-image-4.4.0-112-generic but it is not going to be installed
    linux-signed-image-4.4.0-101-generic : Depends: linux-image-4.4.0-101-generic (= 4.4.0-101.124) but it is not going to be installed
    linux-signed-image-4.4.0-103-generic : Depends: linux-image-4.4.0-103-generic (= 4.4.0-103.126) but it is not going to be installed
    linux-signed-image-4.4.0-112-generic : Depends: linux-image-4.4.0-112-generic (= 4.4.0-112.135) but it is not going to be installed
    linux-signed-image-4.4.0-97-generic : Depends: linux-image-4.4.0-97-generic (= 4.4.0-97.120) but it is not going to be installed
    linux-signed-image-4.4.0-98-generic : Depends: linux-image-4.4.0-98-generic (= 4.4.0-98.121) but it is not going to be installed
   E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
   
9. 根据提示， 输入 sudo apt-get -f install
   结果Reading package lists... Done
10. Building dependency tree
    Reading state information... Done
    Correcting dependencies... Done
    The following packages were automatically installed and are no longer required:
      linux-headers-4.4.0-101 linux-headers-4.4.0-101-generic linux-headers-4.4.0-103 linux-headers-4.4.0-103-generic linux-headers-4.4.0-97 linux-headers-4.4.0-97-generic
      linux-headers-4.4.0-98 linux-headers-4.4.0-98-generic linux-image-4.4.0-101-generic linux-image-4.4.0-103-generic linux-image-4.4.0-97-generic linux-image-4.4.0-98-generic
      linux-image-extra-4.4.0-101-generic linux-image-extra-4.4.0-103-generic linux-image-extra-4.4.0-97-generic linux-image-extra-4.4.0-98-generic linux-signed-image-4.4.0-101-generic
      linux-signed-image-4.4.0-103-generic linux-signed-image-4.4.0-97-generic linux-signed-image-4.4.0-98-generic
    Use 'sudo apt autoremove' to remove them.
    The following additional packages will be installed:
      linux-image-4.4.0-112-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-4.4.0-112-generic
    0 upgraded, 1 newly installed, 0 to remove and 228 not upgraded.
    19 not fully installed or removed.
    Need to get 0 B/21.9 MB of archives.
    After this operation, 66.9 MB of additional disk space will be used.
    Do you want to continue? [Y/n] y
    (Reading database ... 532106 files and directories currently installed.)
    Preparing to unpack .../linux-image-4.4.0-112-generic_4.4.0-112.135_amd64.deb ...
    Examining /etc/kernel/preinst.d/
    run-parts: executing /etc/kernel/preinst.d/intel-microcode 4.4.0-112-generic /boot/vmlinuz-4.4.0-112-generic
    Done.
    Unpacking linux-image-4.4.0-112-generic (4.4.0-112.135) ...
    dpkg: error processing archive /var/cache/apt/archives/linux-image-4.4.0-112-generic_4.4.0-112.135_amd64.deb (--unpack):
     cannot copy extracted data for './boot/System.map-4.4.0-112-generic' to '/boot/System.map-4.4.0-112-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 4.4.0-112-generic /boot/vmlinuz-4.4.0-112-generic
    run-parts: executing /etc/kernel/postrm.d/zz-update-grub 4.4.0-112-generic /boot/vmlinuz-4.4.0-112-generic
    Errors were encountered while processing:
     /var/cache/apt/archives/linux-image-4.4.0-112-generic_4.4.0-112.135_amd64.deb
    E: Sub-process /usr/bin/dpkg returned an error code (1)
    
11. 再次查看旧内核 ls /boot
    abi-4.4.0-101-generic     initrd.img-4.4.0-101-generic          System.map-4.4.0-98-generic
    abi-4.4.0-103-generic     initrd.img-4.4.0-103-generic          System Volume Information
    abi-4.4.0-104-generic     initrd.img-4.4.0-104-generic          vmlinuz-4.4.0-101-generic
    abi-4.4.0-108-generic     initrd.img-4.4.0-75-generic.old-dkms  vmlinuz-4.4.0-101-generic.efi.signed
    abi-4.4.0-109-generic     initrd.img-4.4.0-97-generic           vmlinuz-4.4.0-103-generic
    abi-4.4.0-97-generic      initrd.img-4.4.0-98-generic           vmlinuz-4.4.0-103-generic.efi.signed
    abi-4.4.0-98-generic      lost+found                            vmlinuz-4.4.0-104-generic
    config-4.4.0-101-generic  memtest86+.bin                        vmlinuz-4.4.0-104-generic.efi.signed
    config-4.4.0-103-generic  memtest86+.elf                        vmlinuz-4.4.0-108-generic
    config-4.4.0-104-generic  memtest86+_multiboot.bin              vmlinuz-4.4.0-109-generic
    config-4.4.0-108-generic  System.map-4.4.0-101-generic          vmlinuz-4.4.0-97-generic
    config-4.4.0-109-generic  System.map-4.4.0-103-generic          vmlinuz-4.4.0-97-generic.efi.signed
    config-4.4.0-97-generic   System.map-4.4.0-104-generic          vmlinuz-4.4.0-98-generic
    config-4.4.0-98-generic   System.map-4.4.0-108-generic          vmlinuz-4.4.0-98-generic.efi.signed
    efi                       System.map-4.4.0-109-generic
    grub                      System.map-4.4.0-97-generic
    
12. 先强制删除一个不用的旧内核$ sudo dpkg --force-all -P linux-image-4.4.0-97-generic
    dpkg: linux-image-4.4.0-97-generic: dependency problems, but removing anyway as you requested:
     linux-signed-image-4.4.0-97-generic depends on linux-image-4.4.0-97-generic (= 4.4.0-97.120).
     linux-image-extra-4.4.0-97-generic depends on linux-image-4.4.0-97-generic.
    
    
    (Reading database ... 527669 files and directories currently installed.)
    Removing linux-image-4.4.0-97-generic (4.4.0-97.120) ...
    Examining /etc/kernel/prerm.d.
    run-parts: executing /etc/kernel/prerm.d/dkms 4.4.0-97-generic /boot/vmlinuz-4.4.0-97-generic
    Examining /etc/kernel/postrm.d .
    run-parts: executing /etc/kernel/postrm.d/initramfs-tools 4.4.0-97-generic /boot/vmlinuz-4.4.0-97-generic
    update-initramfs: Deleting /boot/initrd.img-4.4.0-97-generic
    run-parts: executing /etc/kernel/postrm.d/zz-update-grub 4.4.0-97-generic /boot/vmlinuz-4.4.0-97-generic
    Generating grub configuration file ...
    Found linux image: /boot/vmlinuz-4.4.0-109-generic
    Found linux image: /boot/vmlinuz-4.4.0-108-generic
    Found linux image: /boot/vmlinuz-4.4.0-104-generic
    Found initrd image: /boot/initrd.img-4.4.0-104-generic
    Found linux image: /boot/vmlinuz-4.4.0-103-generic
    Found initrd image: /boot/initrd.img-4.4.0-103-generic
    Found linux image: /boot/vmlinuz-4.4.0-101-generic
    Found initrd image: /boot/initrd.img-4.4.0-101-generic
    Found linux image: /boot/vmlinuz-4.4.0-98-generic
    Found initrd image: /boot/initrd.img-4.4.0-98-generic
    Found Windows Boot Manager on /dev/sdd1@/EFI/Microsoft/Boot/bootmgfw.efi
    Adding boot menu entry for EFI firmware configuration
    done
    Purging configuration files for linux-image-4.4.0-97-generic (4.4.0-97.120) ...
    Examining /etc/kernel/postrm.d .
    run-parts: executing /etc/kernel/postrm.d/initramfs-tools 4.4.0-97-generic /boot/vmlinuz-4.4.0-97-generic
    run-parts: executing /etc/kernel/postrm.d/zz-update-grub 4.4.0-97-generic /boot/vmlinuz-4.4.0-97-generic
    
13. 此时的磁盘使用情况 $ df
    Filesystem      1K-blocks       Used  Available Use% Mounted on
    udev             12272772          0   12272772   0% /dev
    tmpfs             2458640      10340    2448300   1% /run
    /dev/sdd9        39241336   25723588   11501340  70% /
    tmpfs            12293196        272   12292924   1% /dev/shm
    tmpfs                5120          4       5116   1% /run/lock
    tmpfs            12293196          0   12293196   0% /sys/fs/cgroup
    /dev/sda       2884154032 2526650972  210973348  93% /Backup
    /dev/sdb       5814216808 3493903032 2027271264  64% /Seq_data
    /dev/sdd8          369639     305114      40922  89% /boot
    /dev/sdd10       98299524    5909572   87373584   7% /home
    /dev/sdd11       98299524   73378448   19904708  79% /opt
    /dev/sdd3        62916396   56366304    6550092  90% /win10/OS
    /dev/sdd12      393592316  336866044   36709888  91% /wd
    /dev/sdd4       104857596     385000  104472596   1% /win10/Tools
    /dev/sdd1          507904      41312     466592   9% /boot/efi
    /dev/sdd13      341272432  103292216  220621472  32% /share
    /dev/sdd5       786430972  396949324  389481648  51% /win10/seq_data
    tmpfs             2458640         80    2458560   1% /run/user/1000
    
14. 再次 $ sudo apt-get -f install
    Reading package lists... Done
    Building dependency tree
    Reading state information... Done
    Correcting dependencies... Done
    The following additional packages will be installed:
      linux-image-4.4.0-112-generic linux-image-4.4.0-97-generic
    Suggested packages:
      fdutils linux-doc-4.4.0 | linux-source-4.4.0 linux-tools
    The following packages will be REMOVED:
      linux-image-extra-4.4.0-108-generic
    The following NEW packages will be installed:
      linux-image-4.4.0-112-generic linux-image-4.4.0-97-generic
    0 upgraded, 2 newly installed, 1 to remove and 228 not upgraded.
    11 not fully installed or removed.
    Need to get 21.9 MB/43.9 MB of archives.
    After this operation, 18.9 MB disk space will be freed.
    Do you want to continue? [Y/n] y
    Get:1 https://mirrors.tuna.tsinghua.edu.cn/ubuntu xenial-updates/main amd64 linux-image-4.4.0-97-generic amd64 4.4.0-97.120 [21.9 MB]
    Fetched 21.9 MB in 5s (4,041 kB/s)
    (Reading database ... 526711 files and directories currently installed.)
    Removing linux-image-extra-4.4.0-108-generic (4.4.0-108.131) ...
    run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.4.0-108-generic /boot/vmlinuz-4.4.0-108-generic
    run-parts: executing /etc/kernel/postinst.d/dkms 4.4.0-108-generic /boot/vmlinuz-4.4.0-108-generic
    run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.4.0-108-generic /boot/vmlinuz-4.4.0-108-generic
    update-initramfs: Generating /boot/initrd.img-4.4.0-108-generic
    run-parts: executing /etc/kernel/postinst.d/pm-utils 4.4.0-108-generic /boot/vmlinuz-4.4.0-108-generic
    run-parts: executing /etc/kernel/postinst.d/unattended-upgrades 4.4.0-108-generic /boot/vmlinuz-4.4.0-108-generic
    run-parts: executing /etc/kernel/postinst.d/update-notifier 4.4.0-108-generic /boot/vmlinuz-4.4.0-108-generic
    run-parts: executing /etc/kernel/postinst.d/zz-update-grub 4.4.0-108-generic /boot/vmlinuz-4.4.0-108-generic
    Generating grub configuration file ...
    Found linux image: /boot/vmlinuz-4.4.0-109-generic
    Found linux image: /boot/vmlinuz-4.4.0-108-generic
    Found initrd image: /boot/initrd.img-4.4.0-108-generic
    Found linux image: /boot/vmlinuz-4.4.0-104-generic
    Found initrd image: /boot/initrd.img-4.4.0-104-generic
    Found linux image: /boot/vmlinuz-4.4.0-103-generic
    Found initrd image: /boot/initrd.img-4.4.0-103-generic
    Found linux image: /boot/vmlinuz-4.4.0-101-generic
    Found initrd image: /boot/initrd.img-4.4.0-101-generic
    Found linux image: /boot/vmlinuz-4.4.0-98-generic
    Found initrd image: /boot/initrd.img-4.4.0-98-generic
    Found Windows Boot Manager on /dev/sdd1@/EFI/Microsoft/Boot/bootmgfw.efi
    Adding boot menu entry for EFI firmware configuration
    done
    (Reading database ... 526712 files and directories currently installed.)
    Preparing to unpack .../linux-image-4.4.0-112-generic_4.4.0-112.135_amd64.deb ...
    Examining /etc/kernel/preinst.d/
    run-parts: executing /etc/kernel/preinst.d/intel-microcode 4.4.0-112-generic /boot/vmlinuz-4.4.0-112-generic
    Done.
    Unpacking linux-image-4.4.0-112-generic (4.4.0-112.135) ...
    Selecting previously unselected package linux-image-4.4.0-97-generic.
    Preparing to unpack .../linux-image-4.4.0-97-generic_4.4.0-97.120_amd64.deb ...
    Examining /etc/kernel/preinst.d/
    run-parts: executing /etc/kernel/preinst.d/intel-microcode 4.4.0-97-generic /boot/vmlinuz-4.4.0-97-generic
    Done.
    Unpacking linux-image-4.4.0-97-generic (4.4.0-97.120) ...
    Setting up initramfs-tools (0.122ubuntu8.8) ...
    update-initramfs: deferring update (trigger activated)
    Setting up linux-image-4.4.0-108-generic (4.4.0-108.131) ...
    Running depmod.
    update-initramfs: deferring update (hook will be called later)
    Examining /etc/kernel/postinst.d.
    run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.4.0-108-generic /boot/vmlinuz-4.4.0-108-generic
    run-parts: executing /etc/kernel/postinst.d/dkms 4.4.0-108-generic /boot/vmlinuz-4.4.0-108-generic
    run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.4.0-108-generic /boot/vmlinuz-4.4.0-108-generic
    update-initramfs: Generating /boot/initrd.img-4.4.0-108-generic
    run-parts: executing /etc/kernel/postinst.d/pm-utils 4.4.0-108-generic /boot/vmlinuz-4.4.0-108-generic
    run-parts: executing /etc/kernel/postinst.d/unattended-upgrades 4.4.0-108-generic /boot/vmlinuz-4.4.0-108-generic
    run-parts: executing /etc/kernel/postinst.d/update-notifier 4.4.0-108-generic /boot/vmlinuz-4.4.0-108-generic
    run-parts: executing /etc/kernel/postinst.d/zz-update-grub 4.4.0-108-generic /boot/vmlinuz-4.4.0-108-generic
    Generating grub configuration file ...
    Found linux image: /boot/vmlinuz-4.4.0-112-generic
    Found linux image: /boot/vmlinuz-4.4.0-109-generic
    Found linux image: /boot/vmlinuz-4.4.0-108-generic
    Found initrd image: /boot/initrd.img-4.4.0-108-generic
    Found linux image: /boot/vmlinuz-4.4.0-104-generic
    Found initrd image: /boot/initrd.img-4.4.0-104-generic
    Found linux image: /boot/vmlinuz-4.4.0-103-generic
    Found initrd image: /boot/initrd.img-4.4.0-103-generic
    Found linux image: /boot/vmlinuz-4.4.0-101-generic
    Found initrd image: /boot/initrd.img-4.4.0-101-generic
    Found linux image: /boot/vmlinuz-4.4.0-98-generic
    Found initrd image: /boot/initrd.img-4.4.0-98-generic
    Found linux image: /boot/vmlinuz-4.4.0-97-generic
    Found Windows Boot Manager on /dev/sdd1@/EFI/Microsoft/Boot/bootmgfw.efi
    Adding boot menu entry for EFI firmware configuration
    done
    Setting up linux-image-4.4.0-109-generic (4.4.0-109.132) ...
    Running depmod.
    update-initramfs: deferring update (hook will be called later)
    Examining /etc/kernel/postinst.d.
    run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.4.0-109-generic /boot/vmlinuz-4.4.0-109-generic
    run-parts: executing /etc/kernel/postinst.d/dkms 4.4.0-109-generic /boot/vmlinuz-4.4.0-109-generic
    run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.4.0-109-generic /boot/vmlinuz-4.4.0-109-generic
    update-initramfs: Generating /boot/initrd.img-4.4.0-109-generic
    
    
    gzip: stdout: No space left on device
    E: mkinitramfs failure cpio 141 gzip 1
    update-initramfs: failed for /boot/initrd.img-4.4.0-109-generic with 1.
    run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
    Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-4.4.0-109-generic.postinst line 1052.
    dpkg: error processing package linux-image-4.4.0-109-generic (--configure):
     subprocess installed post-installation script returned error exit status 2
    No apport report written because the error message indicates its a followup error from a previous failure.
                                                                                                              dpkg: dependency problems prevent configuration of linux-image-extra-4.4.0-109-generic:
     linux-image-extra-4.4.0-109-generic depends on linux-image-4.4.0-109-generic; however:
      Package linux-image-4.4.0-109-generic is not configured yet.
    
    
    dpkg: error processing package linux-image-extra-4.4.0-109-generic (--configure):
     dependency problems - leaving unconfigured
    Setting up linux-image-4.4.0-112-generic (4.4.0-112.135) ...
    Running depmod.
    update-initramfs: deferring update (hook will be called later)
    The link /initrd.img is a dangling linkto /boot/initrd.img-4.4.0-109-generic
    Examining /etc/kernel/postinst.d.
    run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.4.0-112-generic /boot/vmlinuz-4.4.0-112-generic
    run-parts: executing /etc/kernel/postinst.d/dkms 4.4.0-112-generic /boot/vmlinuz-4.4.0-112-generic
    run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.4.0-112-generic /boot/vmlinuz-4.4.0-112-generic
    update-initramfs: Generating /boot/initrd.img-4.4.0-112-generic
    
    
    gzip: stdout: No space left on device
    E: mkinitramfs failure cpio 141 gzip 1
    update-initramfs: failed for /boot/initrd.img-4.4.0-112-generic with 1.
    run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
    Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-4.4.0-112-generic.postinst line 1052.
    dpkg: error processing package linux-image-4.4.0-112-generic (--configure):
     subprocess installed post-installation script returned error exit status 2
    dpkg: dependency problems prevent configuration of linux-image-extra-4.4.0-112-generic:
     linux-image-extra-4.4.0-112-generic depends on linux-image-4.4.0-112-generic; however:
      Package linux-image-4.4.0-112-generic is not configured yet.
    
    
    dpkg: error processing package linux-image-extra-4.4.0-112-generic (--configure):
     dependency problems - leaving unconfigured
    dpkg: dependency problems prevent configuration of linux-image-generic:
     linux-image-generic depends on linux-image-4.4.0-112-generic; however:
      Package linux-image-4.4.0-112-generic is not configured yet.
     linux-image-generic depends on linux-image-extra-4.4.0-112-generic; however:
      Package linux-image-extra-4.4.0-112-generic is not configured yet.
    
    
    dpkg: error processing package linux-image-generic (--configure):
     dependency problems - leaving unconfigured
    dpkg: dependency problems prevent configuration of linux-signed-image-4.4.0-112-generic:
     linux-signed-image-4.4.0-112-generic depends on linux-image-4.4.0-112-generic (= 4.4.0-1No apport report written because MaxReports is reached already
                                   No apport report written because MaxReports is reached already
                                                                                                 No apport report written because MaxReports is reached already
                                       No apport report written because MaxReports is reached already
                                                                                                     No apport report written because MaxReports is reached already
                                           No apport report written because MaxReports is reached already
                                                                                                         12.135); however:
      Package linux-image-4.4.0-112-generic is not configured yet.
    
    
    dpkg: error processing package linux-signed-image-4.4.0-112-generic (--configure):
     dependency problems - leaving unconfigured
    dpkg: dependency problems prevent configuration of linux-signed-image-generic:
     linux-signed-image-generic depends on linux-signed-image-4.4.0-112-generic; however:
      Package linux-signed-image-4.4.0-112-generic is not configured yet.
     linux-signed-image-generic depends on linux-image-extra-4.4.0-112-generic; however:
      Package linux-image-extra-4.4.0-112-generic is not configured yet.
    
    
    dpkg: error processing package linux-signed-image-generic (--configure):
     dependency problems - leaving unconfigured
    dpkg: dependency problems prevent configuration of linux-signed-generic:
     linux-signed-generic depends on linux-signed-image-generic (= 4.4.0.112.118); however:
      Package linux-signed-image-generic is not configured yet.
    
    
    dpkg: error processing package linux-signed-generic (--configure):
     dependency problems - leaving unconfigured
    dpkg: dependency problems prevent configuration of linux-signed-image-4.4.0-109-generic:
     linux-signed-image-4.4.0-109-generic depends on linux-image-4.4.0-109-generic (= 4.4.0-109.132); however:
      Package linux-image-4.4.0-109-generic is not configured yet.
    
    
    dpkg: error processing package linux-signed-image-4.4.0-109-generic (--configure):
     dependency problems - leaving unconfigured
    Setting up linux-image-4.4.0-97-generic (4.4.0-97.120) ...
    Running depmod.
    update-initramfs: deferring update (hook will be called later)
    The link /initrd.img is a dangling linkto /boot/initrd.img-4.4.0-112-generic
    Examining /etc/kernel/postinst.d.
    run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.4.0-97-generic /boot/vmlinuz-4.4.0-97-generic
    run-parts: executing /etc/kernel/postinst.d/dkms 4.4.0-97-generic /boot/vmlinuz-4.4.0-97-generic
    run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.4.0-97-generic /boot/vmlinuz-4.4.0-97-generic
    update-initramfs: Generating /boot/initrd.img-4.4.0-97-generic
    
    
    gzip: stdout: No space left on device
    E: mkinitramfs failure cpio 141 gzip 1
    update-initramfs: failed for /boot/initrd.img-4.4.0-97-generic with 1.
    run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
    Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-4.4.0-97-generic.postinst line 1052.
    dpkg: error processing package linux-image-4.4.0-97-generic (--configure):
     subprocess installed post-installation script returned error exit status 2
    No apport report written because MaxReports is reached already
                                                                  Processing triggers for initramfs-tools (0.122ubuntu8.8) ...
    update-initramfs: Generating /boot/initrd.img-4.4.0-108-generic
    Errors were encountered while processing:
     linux-image-4.4.0-109-generic
    warning: file-aligned section .text extends beyond end of file
    warning: checksum areas are greater than image size. Invalid section table?
    Generating grub configuration file ...
    Found linux image: /boot/vmlinuz-4.4.0-112-generic
    Found initrd image: /boot/initrd.img-4.4.0-112-generic
    Found linux image: /boot/vmlinuz-4.4.0-109-generic
    Found initrd image: /boot/initrd.img-4.4.0-109-generic
    Found linux image: /boot/vmlinuz-4.4.0-104-generic
    Found initrd image: /boot/initrd.img-4.4.0-104-generic
    Found Windows Boot Manager on /dev/sdd1@/EFI/Microsoft/Boot/bootmgfw.efi
    Adding boot menu entry for EFI firmware configuration
    done
    Setting up linux-signed-image-generic (4.4.0.112.118) ...
    Setting up linux-signed-generic (4.4.0.112.118) ...
    Setting up linux-signed-image-4.4.0-109-generic (4.4.0-109.132) ...
    warning: file-aligned section .text extends beyond end of file
    warning: checksum areas are greater than image size. Invalid section table?
    Generating grub configuration file ...
    Found linux image: /boot/vmlinuz-4.4.0-112-generic
    Found initrd image: /boot/initrd.img-4.4.0-112-generic
    Found linux image: /boot/vmlinuz-4.4.0-109-generic
    Found initrd image: /boot/initrd.img-4.4.0-109-generic
    Found linux image: /boot/vmlinuz-4.4.0-104-generic
    Found initrd image: /boot/initrd.img-4.4.0-104-generic
    Found Windows Boot Manager on /dev/sdd1@/EFI/Microsoft/Boot/bootmgfw.efi
    Adding boot menu entry for EFI firmware configuration
    done
15. $  sudo purge-old-kernels