KernelCare

KernelCare – the great option for hosting provaiders and businesses. KernelCare runs on Ubuntu, CentOS, Debian, and other popular flavors of Linux. It checks for updates every 4 hours and installs them automatically. Patches can be rolled back. KernelCare is free for nonprofits. To install KernelCare, run the installation script:

wget -qq -O - https://kernelcare.com/installer | bash

If you are using an IP based license, nothing else is required. Otherwise, if you are using a key based license, run the following command to register the service:

/usr/bin/kcarectl --register <your-key>

Where is the registration code string <your-key>provided when signing up for a trial or purchasing a product. You can get it on this page. Below are some useful KernelCare commands. To check if a running KernelCare kernel is supported:

curl -s -L https://kernelcare.com/checker | python

To unregister a server:

sudo kcarectl --unregister

To check the status of the service:

sudo kcarectl --info

The software will automatically check for new patches every 4 hours. To update manually, run:

/usr/bin/kcarectl --update

Canonical Livepatch

Canonical Livepatch is a service that fixes a running kernel without rebooting your Ubuntu system. Livepatch is free to use on three Ubuntu systems. To use this service on more than three computers, you need to subscribe to the Ubuntu Advantage program. Before installing the service, you need to get a livepatch token from the Livepatch service website. After installing the token and enabling the service by running the following two commands:

sudo snap install canonical-livepatch
sudo canonical-livepatch enable <your-key>

To check the status of the service, run:

sudo canonical-livepatch status --verbose

Later, if you want to unregister the machine, use this command:

sudo canonical-livepatch disable <your-key>

The same instructions apply for Ubuntu 20.04 and Ubuntu 18.04.

To begin upgrading the kernel to 4.19 on Debian 8, you must have an active instance of HOSTRY VPS. To install, you need to insert the following lines in the SSH or PuTTY client window, or use a VNC connection. Log in and press Enter. This will automatically install all the necessary packages that are needed for this update, as well as the gpg, kernel key and headers. Then the old core will be removed from your virtual server. After that, use the program to reboot the server and you will switch to a new kernel.

echo '
#!/bin/bash

# Add GPG Key
wget -O - -q https://debian.choopalabs.com/debian.choopalabs.com.gpg.key | apt-key add - 

# Add Vultr Kernel Repo
echo deb http://debian.choopalabs.com/repo/ jessie main >> /etc/apt/sources.list

# Install Vultr 4.19 Kernel
apt-get install -t jessie linux-image
apt-get install -t jessie linux-headers

# Remove old kernel
apt-get autoremove -y
rm -f /root/install-kernel.sh
' > /root/install-kernel.sh
chmod +x /root/install-kernel.sh
/root/install-kernel.sh