Patching the Linux kernel without reboot with Ubuntu livepatch
When you want to maximize the uptime of your servers, you need a way to update the kernel to fix security vulnerabilities without having to reboot the machines.
For that, Canonical provides livepatch: a way to apply live security patches to the Ubuntu's kernel, without the need to reboot.
And I have good news: Canonical provides this service for free for up to 3 machines (desktops or servers)!
The first step is to get your Ubuntu Advantage token at the following address: https://ubuntu.com/advantage
Then on your machine:
$ sudo ua attach [YOUR TOKEN] $ sudo ua enable livepatch $ ua status
Take a look at https://ubuntu.com/livepatch for more information.