if (  ! -e 'work' )#Is this condition right?
          {
    print "creating work/startup directory\n";
    mkdir 'work' or do {
        print "create install directory failed because :$!\n";
        exit 1; 
	};
    mkdir 'work/startup' or do {
        print "create work/startup directory failed because :$!\n";
        exit 1;
	};
}