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$ sudo apt-get install --reinstall kmod

Reading package lists... Done

Building dependency tree      

Reading state information... Done

The following packages will be REMOVED:

  linux-image-extra-3.13.0-44-generic

0 upgraded, 0 newly installed, 1 reinstalled, 1 to remove and 53 not upgraded.

8 not fully installed or removed.

Need to get 84,9 kB of archives.

After this operation, 152 MB disk space will be freed.

Do you want to continue? [Y/n]

Get:1 http://br.archive.ubuntu.com/ubuntu/ trusty/main kmod amd64 15-0ubuntu6 [84,9 kB]

Fetched 84,9 kB in 0s (128 kB/s)

(Reading database ... 700059 files and directories currently installed.)

Removing linux-image-extra-3.13.0-44-generic (3.13.0-44.73) ...

run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 3.13.0-44-generic /boot/vmlinuz-3.13.0-44-generic

run-parts: executing /etc/kernel/postinst.d/dkms 3.13.0-44-generic /boot/vmlinuz-3.13.0-44-generic

Error! Your kernel headers for kernel 3.13.0-44-generic cannot be found.

Please install the linux-headers-3.13.0-44-generic package,

or use the --kernelsourcedir option to tell DKMS where it's located

run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.13.0-44-generic /boot/vmlinuz-3.13.0-44-generic

update-initramfs: Generating /boot/initrd.img-3.13.0-44-generic

cp: cannot stat ‘/sbin/rmmod’: No such file or directory

E: /usr/share/initramfs-tools/hooks/kmod failed with return 1.

update-initramfs: failed for /boot/initrd.img-3.13.0-44-generic with 1.

run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1

dpkg: error processing package linux-image-extra-3.13.0-44-generic (--remove):

 subprocess installed post-removal script returned error exit status 1

Errors were encountered while processing:

 linux-image-extra-3.13.0-44-generic

E: Sub-process /usr/bin/dpkg returned an error code (1)