How to downgrade the Ubuntu kernel?

Juerg Haefliger juerg.haefliger at
Tue Sep 1 12:37:47 UTC 2020

> Hi all,
> I'd like to know how to downgrade the kernel version in Ubuntu systems?
> I'm having a system with Ubuntu 18.04.4 LTS(4.15.0-91-generic kernel)
> and I want to downgrade only the kernel version to 4.4.0-66-generic(it
> is part of 16.04). Is it possible? If so can someone please clarify to
> me on how to do this?

This is not something we support but you could download the deb from [1] and
install it manually using 'dpkg -i <deb>'. Or add
deb xenial-security main restricted
to /etc/apt/sources.list and then run
$ apt update
$ apt install linux-image-4.4.0-66-generic


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