UNIX for Beginners Questions & Answers

#!/bin/bash
IFS=", "
while read f1 f2 f3
do
	echo "$f1"
	echo "$f2"
	echo "$f3"
done < test2.txt > output.txt

cheek
gingivae
hard
palate
inferior
lip
soft
palate
superior
lip
tongue
uvula

cheek, gingivae, hard,
palate, inferior, lip,
soft, palate, superior
lip, tongue, uvula

right, kidney, right ureter,
urethra, urinary, bladder,
left, adrenal gland, abdominal aorta, inferior vena cava, right renal vein, right renal artery, rectum, uterus

while IFS=', ' read -a F
do
  printf "%s\n" "${F[@]}"
done <  newtest2.txt > output.txt

while IFS=, read -a F
do
  printf "%s\n" "${F[@]# }"
done < newtest2.txt > output.txt

while IFS=, read -a F
do
  printf "%s\n" "${F[@]# }"
done < newtest2.txt > output.txt

tr ',' '\n' <file

awk '{$1=$1}1' RS=, newtest2.txt > output.txt