/cvmfs/sft.cern.ch/lcg/app/releases/ROOTYou can activate a particular version within your environment by sourcing the appropriate
thisroot.sh
script, for example:
source /cvmfs/sft.cern.ch/lcg/app/releases/ROOT/6.13.02/x86_64-centos7-gcc48-opt/root/bin/thisroot.sh