Comment 2 for bug 622418

from terminal :
user@user-desktop:~$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be upgraded:
  linux-image-2.6.24-28-generic
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0B/18.4MB of archives.
After this operation, 4096B of additional disk space will be used.
Do you want to continue [Y/n]? y
(Reading database ... 115411 files and directories currently installed.)
Preparing to replace linux-image-2.6.24-28-generic 2.6.24-28.71 (using .../linux-image-2.6.24-28-generic_2.6.24-28.75_i386.deb) ...
Done.
Unpacking replacement linux-image-2.6.24-28-generic ...
dpkg: error processing /var/cache/apt/archives/linux-image-2.6.24-28-generic_2.6.24-28.75_i386.deb (--unpack):
 unable to make backup link of `./boot/vmlinuz-2.6.24-28-generic' before installing new version: Operation not permitted
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Running postrm hook script /sbin/update-grub.
Searching for GRUB installation directory ... found: /boot/grub
Searching for default file ... found: /boot/grub/default
Testing for an existing GRUB menu.lst file ... found: /boot/grub/menu.lst
Searching for splash image ... none found, skipping ...
Found kernel: /boot/vmlinuz-2.6.24-28-generic
Found kernel: /boot/vmlinuz-2.6.24-26-generic
Found kernel: /boot/memtest86+.bin
Updating /boot/grub/menu.lst ... done

Errors were encountered while processing:
 /var/cache/apt/archives/linux-image-2.6.24-28-generic_2.6.24-28.75_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
user@user-desktop:~$