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See and (or alternatively

If the latter is not available (taken from the stackoverflow guide): After applying the patch, you must install some packages (sudo apt-get install libncurses-dev libssl-dev) (others will be asked for by make / error if they do not exist), then type make menuconfig and select the Fully Preemptible Kernel (RT) (Processor type and features -> Preemption Model -> Fully Preemptible Kernel (RT), could be located under general settings depending on the kernel version). After that, install the Kernel and apply it:

make -j20
sudo make modules_install -j20
sudo make install -j20

cd /boot ls sudo update-grub

"To change default kernel in grub, edit the GRUB_DEFAULT value in /etc/default/grub to your desired kernel." Then reboot, uname -a should now indicate that the new kernel is used.

Make sure to install a kernel that fits the current kernel used by your distribution.

Known Problems

If ubuntu is unable to locate the libncurses-dev package, try again the ubuntu full-scale installation.

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