$ ./bin/ls -a data | ./bin/head -n 1
empty.txt
$ ./bin/ls -a data | ./bin/head -n 2000
empty.txt
FIRST.txt
.hidden.txt
pwd.txt
subdir
yat.txt
$ ./bin/head -n 1 cut_data/data.spaces | ./bin/cut -f 2
world
$ ./bin/head -n 1 cut_data/data.csv | ./bin/cut -d , -f 1
hello
$ ./bin/head -n 1 cut_data/data.csv | ./bin/cut -d , -f 3
me
$ quit