#1 sort -d file.txt | uniq sort -n file.txt | uniq sort -d file.txt | uniq > d.txt sort -n file.txt | uniq > n.txt sort -d file.txt | uniq >> d.txt sort -n file.txt | uniq >> n.txt #2 grep Maycomb test.txt grep -o Maycomb test.txt | grep -c Maycomb