Grading: 10 pts  Q1: 4 pts Q2-7: 1 pt 

1) cat foo bar | sort | uniq | head -4 > smallest.txt
2) ls -lR /home 2> /dev/null
3) ls -1R /home 2> /dev/null | grep '\.png$'
4) ls -1R /home 2> /dev/null | grep '\.png$' | sort
5) ls -1R /home 2> /dev/null | grep '\.png$' | sort | uniq
6) ls -1R /home 2> /dev/null | grep '\.png$' | sort | uniq | wc -l
7) ls -1R /home 2> /dev/null | grep '\.png$' | sort | uniq | tee png_list.out | wc -l