@Tomek
So KernelCare is never good alternative or not?
This answered has to be replied to with: yes, as far it can be............
But I also want to state the following: if you are buying an OS and wanting to patch or switch components, then you also do not go to your local grocery.
Maybe your "grocery" may have everything you need, but still you want to have the expert advice or help or support from the builder or supplier of the OS!
In short, it is a second or third best alternative........and that roughly translates to "not a good alternative" in the language for sysadmins.
There are quite a lot of them for me:
KernelCare Directory
What if your kernel is custom, self-compiled, special, or just old?
CloudLinux - Main | New template
Well, this is not ALL of them...........some are missing out and that can make KernelCare useless, if your specific kernel is not supported.
The thing is also visible from that KernelCare directory: attention is being paid to everything.
The word "focus" is not the keyword and that is something that Ubuntu Advantage really has: focus to Ubuntu.
In essence, KernelCare is using "the buckshot" approach: shoot at everything, support everything............and to be honest, even though that is a bad approach, they are doing a very good job at it.
But the performance of KernelCare team or the Plesk extension is not the topic of discussion, one should always ask: are the better alternatives?
And there are............the paid-for Ubuntu Advantage OR the (free) Canonical Live Patch.
Regards...........