Shell Programming and Scripting

jar
bottle
gum

tube
cereal
bag

#many lines not necessary
ingredients
#many line not necesary
ingredients

#many lines not necessary
ingredients
jar
bottle
gum

tube
cereal
bag

#many line not necesary
ingredients

#! /bin/bash
i=1
while read line
do
    if [ $(echo $line | grep ingredient) ] && [ $i -eq 1 ]
    then
        echo $line
        cat items.txt
        (( i++ ))
    else
        echo $line
    fi
done < fruits.txt

#!/bin/bash

while read line
do
        printf "%s\n" "$line"
        if [[ "$line" =~ "ingredient" ]]
        then
                [ -z "$flag" ] && cat items.txt
                flag=1
        fi
done < fruits.txt