touch somethingToRemove
ls -1 | grep -v getData | xargs rm
wget http://db.csail.mit.edu/data/data4.tar.gz;
wget http://db.csail.mit.edu/data/D6.data.ros.gz;
gunzip D6.data.ros.gz;
tar -xzvf data4.tar.gz;
rm data4.tar.gz
