How to skip kernel update?

Question

I am running Ubuntu 12.04.1 LTS i686 on VirtulBox. Every time I check the updates, there's a new Linux kernel. If I install the new kernel, I have to install the Virtulbox Guest Additions again and reboot the server. I don't want to do this every week. I know I can manually uncheck the kernel packages from update manager, but is there a way to skip the kernel update automatically? I found an answer here, but it's for Ubuntu 10. Thanks.

Answer 1

APT (Advanced Packaging Tool) is the system that Ubuntu uses to manage all of the software installed on a system. It allows you to “pin” a package to a certain version, so that it won’t be updated when you the Update Manager runs.

To pin your kernel packages, first you must determine what version your kernel is. One way to do this is to open the Synaptic Package Manager in System > Administration.

Type in “linux-generic” in the Quick search text field and hit enter.

Make a note of the number listed in the “Installed Version” column. We’ll use it in the next step.

Next, we need to edit the file /etc/apt/preferences. Open it by pressing Alt+F2 to bring up the Run Application window and entering in:

gksudo gedit /etc/apt/preferences

This will open up a gedit window. Most likely the window will be blank, unless you’ve played around with APT before.

In the window, type in the following, replacing the version number with the version number you found in the Synaptic Package Manager.

Package: linux-generic linux-headers-generic linux-image-generic linux-restricted-modules-generic
Pin: version <insert version here>
Pin-Priority: 1001

Save the file and close gedit. If you open the Update Manager, you should see that the Linux kernel updates are now hidden!

Source

Blocking packages with APT/DPKG

Remember the package name of your kernel from above.

Open a terminal and run:

sudo -s

And hit enter.

Enter your password for sudo:

echo kernel_package_name hold | dpkg --set-selections

Replace kernel_package_name with the name of the kernel you want to pin.

Now run:

sudo apt-get update && sudo apt-get upgrade

To remove pin from Apt/Dpkg:

Open a terminal

sudo -s
echo kernel_package install | dpkg --set-selections

Replace kernel_package with the package you want to pin.

Now run:

sudo apt-get update &&  sudo apt-get upgrade

Source

What you're trying to do is called pining. The sources i gave you above, have the essentials on what you must do to accomplish your tasks in hand.

Answer 2

In one line it is:

echo $(dpkg -l "*$(uname -r)*" | grep image | awk '{print $2}') hold | dpkg --set-selections

This will set kernel's image state from install to hold and thus will prevent updates.

Answer 3

The one-liner by Christoph doesn't take the extra package into account (e.g. linux-image-extra-3.13.0-45-generic). Rather use this one:

for i in $(dpkg -l "*$(uname -r)*" | grep image | awk '{print $2}'); do echo $i hold | dpkg --set-selections; done

Answer 4

In relation superlexx's suggestion: that line will miss the "headers" package:

dpkg -l "*$(uname -r)*" | grep image | awk '{print $2}'
linux-image-3.13.0-48-generic
linux-image-extra-3.13.0-48-generic

So how about simply using the following:

dpkg -l "*$(uname -r)*" | grep kernel | awk '{print $2}'
linux-headers-3.13.0-48-generic
linux-image-3.13.0-48-generic
linux-image-extra-3.13.0-48-generic

Answer 5

This purges meta kernel packages that enable kernel updates:

sudo apt purge $(apt-cache rdepends -i --installed linux-{headers,image}-$(uname -r)|awk '!/[0-9]/ && /^[ ]/{print $1}')

(If you have just upgraded kernel, you have to reboot first with the new kernel, or find the latest kernel release and use it in above instead of "$(uname -r)".)

It is recommended to install kernels updates though since they are mostly security updates.

Answer 6

On Ubuntu 16.04.1, the following code works

for i in $(dpkg -l "*$(uname -r)*" | grep image | awk '{print $2}'); do echo $i hold | sudo dpkg --set-selections; done

the is an improvement of Superlexx's code, the sudo is added

dpkg -l | grep linux-image

You will find:

hi linux-image-4.4.0-34-generic ...

hi linux-image-extra-4.4.0-34-generic ...

note that the tag now reads hi, not ii

to remove pin

for i in $(dpkg -l "*$(uname -r)*" | grep image | awk '{print $2}'); do echo $i install | sudo dpkg --set-selections; done

Answer 7

Shorter version: (Replace "hold" with "install" to remove pin)

 dpkg -l "*$(uname -r)*" | grep kernel | awk '{print $2,"hold"}' | sudo dpkg --set-selections

To see the state of all kernel images and headers, run:

 dpkg --get-selections | grep "linux-"