Purging one linux header

gistfile1.txt

$ sudo apt-get purge linux-headers-3.13.0-100

Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  linux-headers-3.13.0-100* linux-headers-3.13.0-100-generic*
  linux-image-extra-3.13.0-100-generic linux-image-extra-3.13.0-101-generic
  linux-image-extra-3.13.0-92-generic
0 upgraded, 0 newly installed, 5 to remove and 7 not upgraded.
10 not fully installed or removed.
After this operation, 417 MB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 183687 files and directories currently installed.)
Removing linux-image-extra-3.13.0-100-generic (3.13.0-100.147) ...
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 3.13.0-100-generic /boot/vmlinuz-3.13.0-100-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.13.0-100-generic /boot/vmlinuz-3.13.0-100-generic
update-initramfs: Generating /boot/initrd.img-3.13.0-100-generic
E: /usr/share/initramfs-tools/hooks/fixrtc failed with return 1.
update-initramfs: failed for /boot/initrd.img-3.13.0-100-generic with 1.
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
dpkg: error processing package linux-image-extra-3.13.0-100-generic (--remove):
 subprocess installed post-removal script returned error exit status 1
Removing linux-image-extra-3.13.0-101-generic (3.13.0-101.148) ...
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 3.13.0-101-generic /boot/vmlinuz-3.13.0-101-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.13.0-101-generic /boot/vmlinuz-3.13.0-101-generic
update-initramfs: Generating /boot/initrd.img-3.13.0-101-generic
E: /usr/share/initramfs-tools/hooks/fixrtc failed with return 1.
update-initramfs: failed for /boot/initrd.img-3.13.0-101-generic with 1.
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
dpkg: error processing package linux-image-extra-3.13.0-101-generic (--remove):
 subprocess installed post-removal script returned error exit status 1
Removing linux-image-extra-3.13.0-92-generic (3.13.0-92.139) ...
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 3.13.0-92-generic /boot/vmlinuz-3.13.0-92-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.13.0-92-generic /boot/vmlinuz-3.13.0-92-generic
update-initramfs: Generating /boot/initrd.img-3.13.0-92-generic
E: /usr/share/initramfs-tools/hooks/fixrtc failed with return 1.
update-initramfs: failed for /boot/initrd.img-3.13.0-92-generic with 1.
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
dpkg: error processing package linux-image-extra-3.13.0-92-generic (--remove):
 subprocess installed post-removal script returned error exit status 1
Errors were encountered while processing:
 linux-image-extra-3.13.0-100-generic
 linux-image-extra-3.13.0-101-generic
 linux-image-extra-3.13.0-92-generic
E: Sub-process /usr/bin/dpkg returned an error code (1)