$ sudo apt-get install --reinstall linux-image-generic
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following package was automatically installed and is no longer required:
  nvidia-settings-319
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
  linux-image-3.2.0-87-generic
Suggested packages:
  fdutils linux-doc-3.2.0 linux-source-3.2.0 linux-tools
The following NEW packages will be installed:
  linux-image-3.2.0-87-generic linux-image-generic
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/38.8 MB of archives.
After this operation, 150 MB of additional disk space will be used.
Do you want to continue [Y/n]? Y
Selecting previously unselected package linux-image-3.2.0-87-generic.
(Reading database ... 432917 files and directories currently installed.)
Unpacking linux-image-3.2.0-87-generic (from .../linux-image-3.2.0-87-generic_3.2.0-87.125_amd64.deb) ...
Done.
Selecting previously unselected package linux-image-generic.
Unpacking linux-image-generic (from .../linux-image-generic_3.2.0.87.101_amd64.deb) ...
Setting up linux-image-3.2.0-87-generic (3.2.0-87.125) ...
Running depmod.
update-initramfs: deferring update (hook will be called later)
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 3.2.0-87-generic /boot/vmlinuz-3.2.0-87-generic
run-parts: executing /etc/kernel/postinst.d/dkms 3.2.0-87-generic /boot/vmlinuz-3.2.0-87-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.2.0-87-generic /boot/vmlinuz-3.2.0-87-generic
update-initramfs: Generating /boot/initrd.img-3.2.0-87-generic
run-parts: executing /etc/kernel/postinst.d/pm-utils 3.2.0-87-generic /boot/vmlinuz-3.2.0-87-generic
run-parts: executing /etc/kernel/postinst.d/update-notifier 3.2.0-87-generic /boot/vmlinuz-3.2.0-87-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 3.2.0-87-generic /boot/vmlinuz-3.2.0-87-generic
Generating grub.cfg ...
Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported.
Found linux image: /boot/vmlinuz-3.2.0-87-generic
Found initrd image: /boot/initrd.img-3.2.0-87-generic
Found memtest86+ image: /memtest86+.bin
done
Setting up linux-image-generic (3.2.0.87.101) ...
ME@azsxdc:~$ uname -r
3.2.0-87-generic