Read file line by line and count no. of lines using Shell script

Guys, in today's post we'll see how to parse a file line by line and count the number of lines in it.

We will simply use redirection to read the file. Note that we will pass the filename as a runtime parameter to the script.

Alright here we go. Suppose I have a file TextFile1.txt with the following contents. I want to print the total number of lines in it.

ABCD

DEFG

GHI

JKL

MNO

PQR

STU

VWXYZ

Now, here's the script part.

#!/bin/bash

#Sript to count number of lines in a file

File=$1

count=0

while read LINE

do

let count++

echo "$count $LINE"

done < $File

echo -e "Total $count Lines read\n"

Here's the output :

1 ABCD

2 DEFG

3 GHI

4 JKL

5 MNO

6 PQR

7 STU

8 VWXYZ

Total 8 Lines read

Cheers it has correctly displayed the count of lines in the file. In case of any questions/doubts, kindly leave your comments.