root@Ubuntu-1204-precise-64-minimal /usr/src # dpkg -i linux-headers-3.6.9-cs16-                                                                                                                                wheezy-rt21_1.2_amd64.deb
Selecting previously unselected package linux-headers-3.6.9-cs16-wheezy-rt21.
(Reading database ... 46646 files and directories currently installed.)
Unpacking linux-headers-3.6.9-cs16-wheezy-rt21 (from linux-headers-3.6.9-cs16-wh                                                                                                                                eezy-rt21_1.2_amd64.deb) ...
Setting up linux-headers-3.6.9-cs16-wheezy-rt21 (1.2) ...
Examining /etc/kernel/header_postinst.d.
root@Ubuntu-1204-precise-64-minimal /usr/src # dpkg -i linux-image-3.6.9-cs16-wheezy-rt21_1.2_amd64.deb
Selecting previously unselected package linux-image-3.6.9-cs16-wheezy-rt21.
(Reading database ... 60138 files and directories currently installed.)
Unpacking linux-image-3.6.9-cs16-wheezy-rt21 (from linux-image-3.6.9-cs16-wheezy-rt21_1.2_amd64.deb) ...
Done.
Setting up linux-image-3.6.9-cs16-wheezy-rt21 (1.2) ...

 Hmm. There is a symbolic link /lib/modules/3.6.9-cs16-wheezy-rt21/build
 However, I can not read it: No such file or directory
 Therefore, I am deleting /lib/modules/3.6.9-cs16-wheezy-rt21/build


 Hmm. The package shipped with a symbolic link /lib/modules/3.6.9-cs16-wheezy-rt21/source
 However, I can not read the target: No such file or directory
 Therefore, I am deleting /lib/modules/3.6.9-cs16-wheezy-rt21/source

Running depmod.
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 3.6.9-cs16-wheezy-rt21 /boot/vmlinuz-3.6.9-cs16-wheezy-rt21
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.6.9-cs16-wheezy-rt21 /boot/vmlinuz-3.6.9-cs16-wheezy-rt21
update-initramfs: Generating /boot/initrd.img-3.6.9-cs16-wheezy-rt21
W: Possible missing firmware /lib/firmware/rtl_nic/rtl8168g-1.fw for module r8169
W: Possible missing firmware /lib/firmware/rtl_nic/rtl8106e-1.fw for module r8169
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 3.6.9-cs16-wheezy-rt21 /boot/vmlinuz-3.6.9-cs16-wheezy-rt21
Generating grub.cfg ...
Found linux image: /boot/vmlinuz-3.6.9-cs16-wheezy-rt21
Found initrd image: /boot/initrd.img-3.6.9-cs16-wheezy-rt21
Found linux image: /boot/vmlinuz-3.2.0-39-generic
Found initrd image: /boot/initrd.img-3.2.0-39-generic
Found memtest86+ image: /memtest86+.bin
  No volume groups found
Found Ubuntu 12.04.2 LTS (12.04) on /dev/sda3
Found Ubuntu 12.04.2 LTS (12.04) on /dev/sdb3
done