I'm a little confused by Ubuntu/Linux kernel updates. Coming from a Windows background I sort of expect all updates to be available via the update manager, in the case of Ubuntu
Yet if I look at the kernel versions of all our servers (around 60 of them) I see many have different kernels between
3.13.0-52-generic even though they are all running Ubuntu 14.04.2.
If I login to a server with
3.13.0-24-generic running and run an upgrade, no updates to the kernel are offered.
Why don't new kernel versions get installed / applied with an
apt-get upgrade and why doesn't a
do-release-upgrade update the kernel the same (latest) kernel?
Can someone give a little background on how linux/ubuntu kernel updates work?
Note, I am running
apt-get update before
apt-get upgrade yet no kernel updates are installed.