Connect Commands With Pipes

grep "J" techs.txt
grep -n "J" techs.txt
head -n 2 techs.txt
grep -n "J" techs.txt | head -n 2
grep -n "J" techs.txt | tail -n 2
head -n 5 techs.txt | grep "J"
head -n 4 techs.txt | grep "J"
grep -n "J" techs.txt | head -n 5 > result.txt
cat result.txt