I have multiple kernels installed in my pc. In which an unsigned version is active now. I want to switch back to an older signed version of the kernel.
When I run the following command:
dpkg --list | grep linux-image
This is what its listing:
ic linux-image-4.15.0-29-generic 4.15.0-29.31 Signed kernel image generic
rc linux-image-4.15.0-39-generic 4.15.0-39.42 Signed kernel image generic
ii linux-image-4.15.0-42-generic 4.15.0-42.45 Signed kernel image generic
ii linux-image-4.15.0-43-generic 4.15.0-43.46 Signed kernel image generic
ii linux-image-generic 126.96.36.199.45 Generic Linux kernel image
ii linux-image-unsigned-4.19.5-041905-generic 4.19.5-041905.201812031110 Linux kernel image for version 4.19.5 on 64 bit x86 SMP
The 6th kernel is active now. Which is not signed. And due to that facing lots of issues in updating and installing different packages.
I would like to switch to 4th kernel (Linux-image-4.15.0-43-generic 4.15.0-43.46) signed version.
How to do that? Also is it possible to remove all other kernels?