dpkg --purge linux-image-extra-3.19.0-39-generic
(Reading database ... 96919 files and directories currently installed.)
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 (--purge):
 subprocess installed post-removal script returned error exit status 1
Errors were encountered while processing:
 linux-image-extra-3.19.0-39-generic