read command – nixCraft

Shell Script To Sort Numbers in File In Ascending Order

in Academic, String Management last updated October 20, 2008

Shell program to sort numbers in file in ascending order.

Shell Script To Provide ls -l in output in customized format

in Academic, Decision Making, File-management last updated October 20, 2008

Write the shell program which produces a report from the output of ls -l in the following format

Shell Script Which Will Discards All But One of Successive Identical

in Academic, File-management last updated October 20, 2008

Write the shell program unique, which will discards all but one of successive identical.

Shell Script To Write Odd and Even Line To Respective Files

in Academic, Decision Making, File-management last updated September 17, 2008

A shell script that, given a file name as the argument will write the even numbered line to a file with name evenfile and odd numbered lines in a text file called oddfile.

Shell Script To Translate All Characters In a File To Lowercase

in File-management last updated September 16, 2008

A UNIX shell script to translate all the characters to lower case in a given text file.

Shell Script That Display The Last Modification Time Of Any File

in File-management last updated September 13, 2008

A Shell Script That Display The Last Modification Time Of Any File Inputted Via a Keyboard.

Shell Script Searches For A Single Word Pattern Recursively

in Academic last updated May 5, 2008

#!/bin/bash
# Write a shell script that searches for a single word pattern recursively
# in the current working directory and display the numbers of times it occurred.
# -------------------------------------------------------------------------
# Copyright (c) 2005 nixCraft project <http://cyberciti.biz/fb/>
# This script is licensed under GNU GPL version 2.0 or above
# -------------------------------------------------------------------------
# This script is part of nixCraft shell script collection (NSSC)
# Visit http://bash.cyberciti.biz/ for more information.
# ----------------------------------------------------------------------
echo -n "Enter one word pattern : "
read pattern
# wc  - word count
COUNT=$(grep -wr "${pattern}" . 2> /dev/null | wc -l)
echo "${pattern} occurred ${COUNT} times."

#!/bin/bash

# Write a shell script that searches for a single word pattern recursively

# in the current working directory and display the numbers of times it occurred.

# -------------------------------------------------------------------------

# This script is licensed under GNU GPL version 2.0 or above

# -------------------------------------------------------------------------

# This script is part of nixCraft shell script collection (NSSC)

# Visit http://bash.cyberciti.biz/ for more information.

# ----------------------------------------------------------------------

echo -n "Enter one word pattern : "

read pattern

# wc - word count

COUNT=$(grep -wr "${pattern}" . 2> /dev/null | wc -l)

echo "${pattern} occurred ${COUNT} times."

Shell Script To Display Last Five Lines Of The File

in Academic last updated April 12, 2008

Given the filename by the user as the input, write a shell script to display the last five lines of the file.

Shell Script

#!/bin/bash
# get filename
echo -n "Enter File Name : "
read fileName

# make sure file exits for reading
if [ ! -f $fileName ]; then
  echo "Filename $fileName does not exists"
  exit 1
fi

# display last five lines of the file using tail command
tail -5 $fileName

#!/bin/bash

# get filename

echo -n "Enter File Name : "

read fileName

# make sure file exits for reading

if [ ! -f $fileName ]; then

echo "Filename $fileName does not exists"

exit 1

# display last five lines of the file using tail command

tail -5 $fileName

Command Line Argument

You can read file name as command line argument:

#!/bin/bash
# get filename
fileName="$1"
# make sure command line arg provided 
if [ -z $1 ]; then
	echo "Syntax: $(basename $0) filename"
	exit 1
fi
# make sure file exits for reading
if [ ! -f $fileName ]; then
  echo "Filename $fileName does not exists"
  exit 1
fi
# ok display last five lines of the file using tail command
tail -5 $fileName

#!/bin/bash

# get filename

fileName="$1"

# make sure command line arg provided

if [ -z $1 ]; then

echo "Syntax: $(basename $0) filename"

exit 1

# make sure file exits for reading

if [ ! -f $fileName ]; then

echo "Filename $fileName does not exists"

exit 1

# ok display last five lines of the file using tail command

tail -5 $fileName

Shell Script accept password using read commnad

in Script last updated April 10, 2008

#!/bin/bash
# Script accept password using read commnad
# Not *very secure*, this script is for learning purpose only 
# -------------------------------------------------------------------------
# This script is part of nixCraft shell script collection (NSSC)
# Visit http://bash.cyberciti.biz/ for more information.
# -------------------------------------------------------------------------
PASS="abc123"
read -s -p "Password: " mypassword
echo ""
[ "$mypassword" == "$PASS" ] && echo "Password accepted" || echo "Access denied"

#!/bin/bash

# Script accept password using read commnad

# Not *very secure*, this script is for learning purpose only

# -------------------------------------------------------------------------

# This script is part of nixCraft shell script collection (NSSC)

# Visit http://bash.cyberciti.biz/ for more information.

# -------------------------------------------------------------------------

PASS="abc123"

read -s -p "Password: " mypassword

echo ""

[ "$mypassword" == "$PASS" ] && echo "Password accepted" || echo "Access denied"