![]() Ubuntu, with Linux 5.11.0-1027-aws (recovery mode) This is what I have in my freshly installed EC2 instance. This will not only list all the entries, but also will include menu sections, since it will be needed for setting the default kernel. Sudo grep 'menuentry \|submenu ' /boot/grub/grub.cfg | cut -f2 -d "'" Now that you have the kernel installed, you need to change your boot configurations to select the older kernel as the default one.įind the grub entry name with the following command: Log in into your console and install the LTS kernel: sudo apt update Contextįrom 18.04 onwards, Canonical introduced the rolling kernel model, which enabled the user to get the latest upstream kernel with bug fixes and performance improvements from the interim Ubuntu versions via regular updates or by launching the latest AMIs.īut what happens if you need specific kernel versions (LTS or any other) due to internal compliance, application compatibility or any other you may encounter. ![]() This guide has been tested on Ubuntu Pro 20.04 on AWS, but it should work also for any other cloud and with the regular versions as well. In this guide, I will show you how to downgrade a recent Ubuntu Pro 20.04 AMI’s kernel to the original LTS version (5.4) No matter what your reasons are, you may be in a situation where you need to downgrade your kernel to a specific version.
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