Why update kernel ?
Update the kernel to new version fixed some newer hardware has no driver software, For me, My earphone has current noice. Someone tell me that is low version kernel trouble. So I search for some article and summary useful things , then I wrote this blog.
Update Linux Kernel Cookbook
Before installing a newer kernel, it’s important that we upgrade installed packages to their newer versions in the backports-repo in order to be sure that dependencies will remain unbroken.
$ sudo apt-get -t stretch-backports upgrade
After the upgrade, choose a kernel from the list and install it with apt.
$ sudo apt-cache search linux-image
Most of the installations would want the kernel without suffix. The rt-suffix stands for realtime and is mostly interesting for embedded projects or machines that will drive industrial hardware. dbg stands for debugging.
Here we chose linux-image-4.19.0-0.bpo.5-amd64 and linux-headers-4.19.0-0.bpo.5-amd64, the newest after 2019-05-18
$ sudo apt-get -t stretch-backports install linux-image-4.19.0-0.bpo.5-amd64 linux-headers-4.19.0-0.bpo.5-amd64
After the installation, reboot your system and select the newly installed kernel from the selection displayed in GRUB. Debian selects the new kernel by default.
Uninstall Linux Kernel on Debain
To check which kernels are currently installed:
$ dpkg --get-selections|grep linux-image linux-image-4.19.0-0.bpo.5-amd64 install linux-image-4.9.0-9-amd64 install linux-image-amd64 install
Uninstall the old one:
$ sudo apt-get remove linux-image-4.9.0-9-amd64
That should be all it takes in order to install a recent kernel and cleanup older kernels on a Debian system. Not so difficult as you thought probably 🙂