Sailing Through The World of Linux BASH Scripting – Part III

Hello Everyone,

In this tutorial,

Let Us Create a Sailing Through The World of Linux BASH Scripting – Part III

You Can also Configure in Redhat Linux, Ubuntu, Fedora, CentOS, LinuxMint, Oracle Linux, Cloud Linux.

Move Current Working Directory

Create a Random File or Folder

Script to Converts UPPERCASE to lowercase

Simple Calculator Program

 Move Current Working Directory

#! /bin/bash

LEVEL=$1

for ((i = 1; i <= LEVEL; i++))

do

CDIR=../$CDIR done cd $CDIR

echo "You are in: "$PWD

exec /bin/bash

Create a Random File or Folder

#! /bin/bash

echo "Hello $USER";

echo "$(uptime)" >> "$(date)".txt

echo "Your File is being saved to $(pwd)“

echo‘ : Prints everything written within the quotes.

‘$‘ : Is a shell variable.

‘>>‘ : The output is redirected to the output of date command followed by txt extension

 Script to Converts UPPERCASE to lowercase

touch small.txt

#!/bin/bash

echo -n "Enter File Name : "

read fileName

if [ ! -f $fileName ]; then

echo "Filename $fileName does not exists"

exit 1

 fi

tr '[A-Z]' '[a-z]' < $fileName >> small.txt

Simple Calculator Program

#! /bin/bash

clear

sum=0

i="y"

echo " Enter one no."

read n1

echo "Enter second no."

read n2

while [ $i = "y" ]

do

echo "1.Addition"

echo "2.Subtraction"

echo "3.Multiplication"

echo "4.Division"

echo "Enter your choice"

read ch

case $ch in

1)sum=`expr $n1 + $n2`

     echo "Sum ="$sum;;

        2)sum=`expr $n1 - $n2`

     echo "Sub = "$sum;;

    3)sum=`expr $n1 \* $n2`

     echo "Mul = "$sum;;

    4)sum=`expr $n1 / $n2`

     echo "Div = "$sum;;

    *)echo "Invalid choice";;

esac

echo "Do u want to continue (y/n)) ?"

read i

if [ $i != "y" ]

then

    exit

fi

done

NOTE :- For Any Clarification Please Below

 

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