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So one of the big features in kernel 4.0 is the ability to update the kernel without rebooting. 16.04 has kernel 4.0. So therefore, is the no reboot feature enabled by default? Or if not, is there a way to enable it?

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Ubuntu has livepatch, which is a livepatching service for Ubuntu 16.04.

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    Why does it require credentials to use? – x0a Jul 16 '17 at 20:59
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    @x0a , It's not part of the "free" base system. It's a paid for add on to Ubuntu Server sold by Canonical (Ubunut's parent company). – Christopher Jul 17 '17 at 20:10
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It is now working

https://auth.livepatch.canonical.com/?user_type=ubuntu-user

sudo snap install canonical-livepatch
sudo canonical-livepatch enable TOKEN_FROM_ABOVE_LINK
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Update:

On 20th October, 2016 Canonical officially announced the support for no reboot kernel patching, freely available on maximum three machines for a single user, check the article for details.


Yes, kernel hot patching is enabled in Ubuntu 16.04.

It was actually introduced in the first 4.0 series kernel on Ubuntu, with the 15.10 release, in October, 2015.

In a nutshell, any Ubuntu release currently having a official repository provided kernel (and mainline too) with version >=4.0 has live patching facility.

Note: Just to be clear, Ubuntu 16.04's kernel has the live patching capability, but Ubuntu offically does not provide any hot patch (as of now) as this answer mentioned.

  • And how do i use that? – k1l Jul 28 '16 at 22:57
  • You're already using it. Update your system with Software Updater, just like you normally do, and notice that you'll need to reboot even less often. – Mattmon Jul 31 '16 at 22:56
  • Are you sure? I don't see any patches being provided by ubuntu. You still need to reboot. – iseletsk Oct 12 '16 at 17:03
  • @iseletsk check the note section of the answer. – heemayl Oct 12 '16 at 17:11

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