# Debian with PREEMPT_RT patched kernel
## Overview
Theses short steps were tested on Debian Wheezy 7.4, x64 core.
## Steps
Create a “workspace”, where you have some free disk space
mkdir ~/rt_kern cd ~/rt_kern
Get the files !
wget -c https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.14.25.tar.xz wget -c https://www.kernel.org/pub/linux/kernel/projects/rt/3.14/patch-3.14.25-rt22.patch.xz
Extract and patch
tar xaf linux-3.14.25.tar.xz unxz patch-3.14.25-rt22.patch.xz cd ./linux-3.14.25 patch -p1 < ../patch-3.14.25-rt22.patch
Get the config of your current Debian kernel
cp -vf /boot/config-3.2.0-4-amd64 .config
Now comes the _fun_ part: Configuring the Kernel That's usually the part where you screw up and build a non-working kernel.
make menuconfig
Note: I missed some libraries so be able to run this command, you probably do too.
sudo aptitude install libncurses5-dev
Once you get the configuration GUI, you have to select a few options:
* Enable the full RT features: `Processor type and features > Preemption Model > (Fully Preemptible Kernel (RT))`
Save and quit (TAB until you can select the option)
Build (where X is two times the number of cores of your CPU). Took 45minutes on my 2.5Ghz Core2Duo, with SSD.
make -jX
Or, you can directly build the debian packages (Name it as you want… I named it _-hyde_)
make deb-pkg LOCALVERSION=-hyde KDEB_PKGVERSION=1
Install it
cd ../ sudo dpkg -i ./linux-image-3.14.25-rt22-hyde_1_amd64.deb
Aaannndd reboot, select your new kernel 
## Links