Sudo grep 'menuentry ' $GRUB_CONFIG | cut -f 2 -d "'" | nl -v 0Ģ Ubuntu, with Linux 5.4.0-1021-gcp (recovery mode)Ĥ Ubuntu, with Linux 5.3.0-1035-azure (recovery mode) export GRUB_CONFIG=`sudo find /boot -name "grub.cfg"` You can use the following commands for the same. Let’s see how to check the kernel boot sequence in GRUB. Thus we need to update the kernel boot sequence in GRUB so that the system can boot from the newly installed kernel. In our case as we have two kernels installed thus the default installed kernel would be at top i.e at 0th position and system will always boot up using this kernel. By default it always tries to boot a kernel which is available at first number in the sequence starting from 0 to 1,2,3 etc. In GRUB of linux boot process, there is a sequence of installed kernel which it loads. Now you have 2 kernels installed in your system, one is the default and other is which you have installed. sudo apt list | grep -i 5.3.0-1035-azure Update the Kernel boot sequence in GRUB Once the kernel got installed successfully then you can verify its using apt list command along with grep command to filter the result only with the newly installed packages. Sudo apt-get install linux-modules-extra-5.3.0-1035-azure Sudo apt-get install linux-modules-5.3.0-1035-azure Sudo apt-get install linux-headers-5.3.0-1035-azure sudo apt-get install linux-image-5.3.0-1035-azure You need to install all these packages for your required version. Below is an example snippet for the same. sudo apt-get updateĪpt-cache search -names-only linux-image Install the new kernel which you want ubuntu to useįor example we want to install 5.3.0-1035-azure ubuntu kernel then we need to install it along with other packages for the same version using apt-get install command. You can search the apt repositories to get the list of all available kernels. Linux version 5.4.0-1021-gcp Get the list of available kernels You can use any of the following commands to see the kernel version. Check the Installed Kernel versionįirst and foremost you need to check the version of already installed kernel. So in this article we will see how we can update the kernel to a specified version manually. Thus in that case you either need to upgrade or downgrade the ubuntu kernel. But the default installed kernel is either an old kernel or a new one which you don’t need. There might be some scenario where you need to have some specified version of ubuntu kernel. When you install ubuntu operating system on any physical or virtual machine then it might have any xyz default Linux kernel version depending upon different versions of ubuntu as well as the customized ubuntu images. ubuntu kernel controls various hardware resources like storage, networking, graphics, memory and cpu of the device. It is one of the first software program which a booting device loads and run on a central processing unit (CPU). Linux Kernel is the core of an ubuntu operating system. It control various processes and decides which process needs to be executed by processor and which process needs to stay in main memory to execute. Kernel is the first program of an operating system which loads after the boot loader and control many other tasks such as disk management, task management, memory management etc. It usually resides in the protected area of system memory so that it can stay safe from being overwritten by any other program. Before going through the process of how to update ubuntu kernel manually, let’s have a brief introduction about what is kernel.
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