diff --git a/Setup-Computer-Debian-11.md b/Setup-Computer-Debian-11.md
index 945c9b4..d17de49 100644
--- a/Setup-Computer-Debian-11.md
+++ b/Setup-Computer-Debian-11.md
@@ -1 +1,218 @@
-.
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+**Prepare Computer**
+
+- Install a Debian 11 Desktop 64 Bit, username: control with sudo permissions
+- Add various packages:
+
+```
+sudo apt-get install fakeroot build-essential cvs flex bison openssh-server git-core geany synaptic joe jed subversion autoconf-archive cmake libreadline-dev libhdf5-dev pkg-config libxml2-dev libzmq3-dev   liblog4cpp5-dev libelf-dev libssl-dev libarchive-dev libgtkmm-3.0-dev libatkmm-1.6-dev libglibmm-2.4-dev libncurses5-dev libxerces-c-dev libboost-dev  xsltproc cifs-utils xterm  meld default-jre autogen autoconf libtool libqwt-qt5-dev  libqt5webkit5-dev rsync 
+
+```
+
+- get the software form the repository, including the System Installation files:
+
+```
+cd
+mkdir work
+cd work
+git clone https://gitlab.psi.ch/microspectro/pixelator.git stxm
+```
+
+- Compile Epics
+
+```
+cd /usr/local/
+sudo mkdir epics
+cd epics/
+sudo chown control .
+tar xfvz ~/work/stxm/SystemInstall/baseR3.14.12.8.tar.gz
+cd base-3.14.12.8/
+make
+
+# edit /etc/profile:
+#    PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/epics/base-3.14.12.8/bin/linux-x86_64/"
+
+sudo cp ~/work/stxm/SystemInstall/epics-64.conf /etc/ld.so.conf.d
+sudo ldconfig
+```
+
+- Compile Nexus Library
+
+```
+mkdir ~/BaseSystem
+cd ~/BaseSystem/
+# get latest Version of Nexus
+wget https://github.com/nexusformat/code/archive/master.zip
+unzip master.zip
+mv code-master nexus
+cd nexus
+cmake -DENABLE_CXX=1 .
+make
+sudo make install
+```
+
+- Install Intens
+
+```
+cd /usr/local
+sudo mkdir intens
+sudo tar xfvz ~/work/stxm/SystemInstall/intens-4.5.15-snapshot-64.tar.gz
+```
+
+- Install PI libs 
+
+```
+cd ~/BaseSystem
+tar xfvj ../work/stxm/SystemInstall/PI_Application_Software-1.4.0.1-INSTALL.tar.bz2
+cd PI_Application_Software/
+sudo ./INSTALL
+#n
+#n  32 bit Lib
+#y  64 bit lib
+#n  UBS rights
+#y  PiPython
+#y  Stage Database
+#n  PiTerminal 32
+#y  PiTerminal 64
+#n  USB rights
+```
+
+- Compile RT Kernel and untar RTAI 
+
+```
+cd ~/BaseSystem
+wget https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/linux-4.14.111.tar.gz
+tar xfz linux-4.14.111.tar.gz
+tar xfj ../work/stxm/SystemInstall/rtai-5.2.tar.bz2
+cd linux-4.14.111
+patch -p1 < ../rtai-5.2/base/arch/x86/patches/hal-linux-4.14.111-x86-3.patch
+cp ~/work/stxm/SystemInstall/config_4.14.111_for_rtai-52 .config
+
+make localmodconfig # Compile only Modules, as they are used on the current computer
+make -j5 deb-pkg LOCALVERSION=-rt1
+
+cd ..
+
+sudo dpkg -i linux-headers-4.14.11-rt1_4.14.111-rt1-1_amd64.deb linux-image-4.14.111-rt1_4.14.111-rt1-1_amd64.deb
+```
+
+
+- To modify Grub load order with a gui:
+
+```
+cd ~/BaseSystem
+tar xfvz ../work/stxm/SystemInstall/grub-customizer_5.1.0.tar.gz
+cd grub-customizer-5.1.0/
+cmake .
+make
+sudo make install
+```
+
+- Compile RTAI 1st run
+
+```
+cd ~/BaseSystem
+cd rtai-5.2
+cp ~/work/stxm/SystemInstall/rtai_config_5.1_first_run .rtai_config
+make  
+  #- check that numer of CPU (in Machine (x86)) matches your computer
+  #- check, that Net RPC is disabled (Base System -> Supported Services)
+  #- check eager inlining (General)
+sudo make install
+  #- to test installation
+cd /usr/realtime/testsuite/kern/latency/
+./run
+```
+
+- Compile Comedi
+
+```
+cd ~/BaseSystem
+unzip ../work/stxm/SystemInstall/comedi-master-20190305.zip
+unzip ../work/stxm/SystemInstall/comedilib-master-20190305.zip
+cd comedi-master
+
+cp ../../work/stxm/SystemInstall/N1231B_reg.h comedi/drivers
+patch -p1 < ~/work/stxm/SystemInstall/comedi.patch
+./autogen.sh
+./configure --with-rtaidir=/usr/realtime
+make
+sudo make install
+sudo depmod -a
+
+cd ../comedilib-master
+./autogen.sh
+./configure
+make
+sudo make install
+```
+
+- Compile RTAI 2nd run
+
+```
+cd ~/BaseSystem
+cd rtai-5.2
+cp ~/work/stxm/SystemInstall/rtai_config_5.1_second_run .rtai_config
+make clean
+make  
+  #- check that numer of CPU (in Machine (x86)) matches your computer
+  #- check, that Net RPC is disabled (Base System -> Supported Services)
+  #- check eager inlining (General)
+sudo make install
+```
+
+- Install Orchestra
+
+```
+cd ~/BaseSystem
+tar xfvz ../work/stxm/SystemInstall/Orchestra-master.tar.gz
+cd Orchestra-master/OrchestraCoreLib
+make
+sudo make install
+
+cd ../OrchestraHostSupervisor
+make
+sudo make install
+
+cd ../OrchestraCore
+make
+sudo make install
+
+cd /usr/local/Orchestra/
+sudo cp -a ~/BaseSystem/Orchestra-master/HMI/ .
+cd /usr/local/bin
+sudo ln -s /usr/local/Orchestra/HMI/OrchestraHMI .
+```
+
+- Load Comedi driver and configure cards 
+
+```
+sudo cp ~/work/stxm/SystemInstall/ComediLoadModules /etc/init.d
+cd /etc/rc2.d
+sudo ln -s ../init.d/ComediLoadModules S98ComediLoadModules
+
+sudo cp ~/work/stxm/SystemInstall/comedi.conf /etc/modprobe.d
+```
+
+- Install STXM Software
+
+```
+cd ~/work/stxm/
+autoreconf -i
+mkdir build 
+cd build 
+../configure
+make
+cd PixelatorController/config/
+make
+cd ../../PixelatorGUI/config/
+make
+```
+
+- Adapt configuration
+
+```
+edit /etc/security/limits.conf
+   add at the end:
+control         soft    memlock         200000
+control         hard    memlock         200000
+```
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