Open a text terminal (emulator console) and type:
sudo -i
or
sudo su
enter root password and follow the instructions below within the terminal.
Use a text editor such as leafpad or nano.
leafpad /etc/apt/sources.list.d/liquorix.list
Add the following line
deb http://liquorix.net/debian sid main
Save and quit
Refresh package list:
apt-get update
Install keyring:
All packages in the liquorix repository are signed. Run the command below to install the keyring package for liquorix.net.
apt-get install liquorix-keyring
Install the kernel:
The Liquorix kernel can be installed by way of meta-packages. This will guarantee that the latest kernel is installed on every upgrade.
32-bit without PAE (HIGHMEM4G):
apt-get install linux-image-liquorix-686 linux-headers-liquorix-686
32-bit with PAE (HIGHMEM64G):
apt-get install linux-image-liquorix-686-pae linux-headers-liquorix-686-pae
64-bit:
apt-get install linux-image-liquorix-amd64 linux-headers-liquorix-amd64
On my system I also had to do
update-grub
Open Menu→ System→ Sparky APTus tool.
Refresh package list.
Navigate to System tab→ Install Liquorix kernel. Follow the instruction.