536N/Aversion=`isabelle version`
965N/Aif [[ $version == *2014 ]]
536N/A echo "you are using $version"
919N/Aelse if [[ $version == *2012 ]]
919N/A echo "uninstall your old Isabelle2012 and install Isabelle2014 by"
919N/A echo " sudo apt-get remove isabelle"
919N/A echo " sudo apt-get install isabelle-installer"
919N/A echo "possibly install Isabelle2014 by"
919N/A echo " sudo apt-get install isabelle-installer"