root@summakor:/boot# apt clean
root@summakor:/boot# apt upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
 linux-headers-4.10.0-26-generic : Depends: linux-headers-4.10.0-26 but it is not installed
 linux-image-generic : Depends: linux-image-extra-4.10.0-26-generic but it is not installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).
root@summakor:/boot# apt --fix-broken 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-image-4.10.0-26-generic linux-image-extra-4.10.0-26-generic
  linux-image-generic thermald
Use 'apt autoremove' to remove them.
The following additional packages will be installed:
  linux-headers-4.10.0-26 linux-image-extra-4.10.0-26-generic
The following NEW packages will be installed:
  linux-headers-4.10.0-26 linux-image-extra-4.10.0-26-generic
0 upgraded, 2 newly installed, 0 to remove and 48 not upgraded.
4 not fully installed or removed.
Need to get 40.6 MB of archives.
After this operation, 230 MB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 http://us.archive.ubuntu.com/ubuntu zesty-updates/main amd64 linux-headers-4.10.0-26 all 4.10.0-26.30 [10.6 MB]
Get:2 http://us.archive.ubuntu.com/ubuntu zesty-updates/main amd64 linux-image-extra-4.10.0-26-generic amd64 4.10.0-26.30 [30.0 MB]
Fetched 40.6 MB in 29s (1,399 kB/s)                                               
(Reading database ... 391358 files and directories currently installed.)
Preparing to unpack .../linux-headers-4.10.0-26_4.10.0-26.30_all.deb ...
Unpacking linux-headers-4.10.0-26 (4.10.0-26.30) ...
dpkg: error processing archive /var/cache/apt/archives/linux-headers-4.10.0-26_4.10.0-26.30_all.deb (--unpack):
 unable to open '/usr/src/linux-headers-4.10.0-26/arch/powerpc/include/asm/book3s/64/hash-4k.h.dpkg-new': Operation not permitted
Preparing to unpack .../linux-image-extra-4.10.0-26-generic_4.10.0-26.30_amd64.deb ...
Unpacking linux-image-extra-4.10.0-26-generic (4.10.0-26.30) ...
dpkg: error processing archive /var/cache/apt/archives/linux-image-extra-4.10.0-26-generic_4.10.0-26.30_amd64.deb (--unpack):
 unable to open '/lib/modules/4.10.0-26-generic/kernel/drivers/watchdog/f71808e_wdt.ko.dpkg-new': Operation not permitted
Errors were encountered while processing:
 /var/cache/apt/archives/linux-headers-4.10.0-26_4.10.0-26.30_all.deb
 /var/cache/apt/archives/linux-image-extra-4.10.0-26-generic_4.10.0-26.30_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@summakor:/boot#