read file in loop bash code example

Example 1: bash for each line of file

while read p; do
  echo "$p"
done <peptides.txt

Example 2: for loop in bash for files

#!/bin/bash
FILES=/path/to/*
for f in $FILES
do
  echo "Processing $f file..."
  # take action on each file. $f store current file name
  cat $f
done

Example 3: read file line loop in bash

for word in $(cat peptides.txt); do echo $word; done