Geant4 installation error

Hello, hope you are doing well!
I am using this link to install geant4 10.6 on ubuntu 19.10
https://indico.tifr.res.in/indico/getFile.py/access?contribId=29&resId=0&materialId=slides&confId=5309
When i wrote command
cmake\ -DCMAKE_INSTALL_PREFIX=/home/afzaal/PET/Geant4/geant4.10.06.p01-install -DGEANT4_USE_QT=ON -DGEANT4_USE_OPENGL_X11=ON -DGEANT4_INSTALL_DATA=ON -DGEANT4_USE_RAYTRACER_X11=ON -DGEANT4_USE_GDML=ON -DGEANT4_USE_SYSTEM_CLHEP=ON -DCLHEP_INCLUDE_DIR=/home/afzaal/CLHEP/2.4.1.3/CLHEP-install/include/ -DCLHEP_LIBRARY=/home/afzaal/CLHEP/2.4.1.3/CLHEP-install/lib/libCLHEP.so -DGEANT4_INSTALL_EXAMPLES=ON /home/afzaal/PET/Geant4/geant4.10.06.p01
Error appeared(screenshot attached).
Any help would really be appreciable.
Thanks for your time and consideration.!
Screenshot from 2020-04-19 06-54-22|690x387

Remove the \ after cmake. It’s the escape character so is assuming you want to run the command “cmake -DCMAKE…” not cmake. Our official install guide is here: http://geant4-userdoc.web.cern.ch/geant4-userdoc/UsersGuides/InstallationGuide/html/index.html