./bin/ls -a data | ./bin/head -n 1
./bin/ls -a data | ./bin/head -n 2000
./bin/head -n 1 cut_data/data.spaces | ./bin/cut -f 2
./bin/head -n 1 cut_data/data.csv | ./bin/cut -d , -f 1
./bin/head -n 1 cut_data/data.csv | ./bin/cut -d , -f 3
quit