apt remove --purge --autoremove linux-image-extra-3.19.0-25-generic
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  linux-image-extra-3.19.0-25-generic linux-image-extra-3.19.0-39-generic
0 upgraded, 0 newly installed, 2 to remove and 5 not upgraded.
6 not fully installed or removed.
After this operation, 320 MB disk space will be freed.
Do you want to continue? [Y/n]
dpkg: warning: files list file for package 'linux-image-extra-3.19.0-25-generic' missing; assuming package has no files currently installed
(Reading database ... 96919 files and directories currently installed.)
Removing linux-image-extra-3.19.0-25-generic (3.19.0-25.26~14.04.1) ...
Removing linux-image-extra-3.19.0-39-generic (3.19.0-39.44~14.04.1) ...
depmod: FATAL: could not load /boot/System.map-3.19.0-39-generic: No such file or directory
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 3.19.0-39-generic /boot/vmlinuz-3.19.0-39-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.19.0-39-generic /boot/vmlinuz-3.19.0-39-generic
update-initramfs: Generating /boot/initrd.img-3.19.0-39-generic
cp: omitting directory '/etc/udev/rules.d/70-persistent-net.rules'
E: /usr/share/initramfs-tools/hooks/udev failed with return 1.
update-initramfs: failed for /boot/initrd.img-3.19.0-39-generic with 1.
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
dpkg: error processing package linux-image-extra-3.19.0-39-generic (--remove):
 subprocess installed post-removal script returned error exit status 1
Errors were encountered while processing:
 linux-image-extra-3.19.0-39-generic
E: Sub-process /usr/bin/dpkg returned an error code (1)