[Shell Script #2] Read word by word from a file

Shell Script Example #2:
There is one more usecase where we often read word by word from a file, then this shell script is very useful.
The below script takes one input file and outputs the same file. We can add few more functionality to this script based on our usecase.

1. #!/bin/bash
2. FILENAME=$1
3. while read var2
4. do
5.   echo "This is $var2"
6.   done < $FILENAME

How to run: Save the above script with extension ".sh" and run using below command

. file_name.sh input.txt

Example:

input.txt

12 23 34

11 33 55

66 77 99

output:

This is 12

This is 23

This is 34

This is 11

This is 33

This is 55

This is 66

This is 77

This is 99

If you want to access every line at a time, then please check [Shell Script #1] post.

If you want to access only two words at a time, then below change would help.

At line #3, while read var1 var2 

At line #5, echo "This is $var1 $var2"

Similarly, iy you need 3 words at a time, then while read var1 var2 var3.