Canonical's Livepatch helps avoid Ubuntu reboots due to kernel upgrades. Livepatch is an alternative to KernelCare from CloudLinux which I showed how to set up here. Canonical are giving you up to 3 servers per account so you can keep those server's kernels up to date without rebooting and avoid critical downtime!
Getting Started with Ubuntu Livepatch from Canonical
Sign up with this link https://auth.livepatch.canonical.com/?user_type=ubuntu-user and make sure to choose Ubuntu user then click the Get your Livepatch token
Get your token after logging in and you will see your token that you can easily copy to the clipboard by clicking the icon on the right.
The key for your [email protected] account is: 4e81a1fd20c1481bf20b15dbc3cdf91b
It's now time to install the Livepatch service on your Ubuntu 18.04 server.
First install snapd
sudo apt install snapd -y
Now you can install the Livepatch service
sudo snap install canonical-livepatch
Enable the Livepatch for the server by entering the token with this command
sudo canonical-livepatch enable <token>
sudo canonical-livepatch enable 4e81a1fd20c1481bf20b15dbc3cdf91b
You should see some output saying that Livepatch is enabled
Successfully enabled device. Using machine-token: 25aea9daeb9f490b8a3ad4880fce5ce8
You can disable the kernel Livepatch with this command
sudo canonical-livepatch disable 4e81a1fd20c1481bf20b15dbc3cdf91b
You should see output saying Livepatch is no longer enabled for that server
Successfully disabled device. Removed machine-token: 25aea9daeb9f490b8a3ad4880fce5ce8
If you see this error
This machine ID is already enabled with a different key or is non-unique then follow these instructions to re-generate a unique machine id.