OS Practicals

8/10/2019 OS Practicals

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UNIVERSITY OF MUMBAI

INSTITUTE OF DISTANCE AND OPEN LEARNING (IDOL)*

*(Institute Of Distance Education (IDE) is renamed)

CERTIFICATE

THE EXPERIMENTS DULY SIGNED IN THIS JOURNAL REPRESENT

THE BONIFIED WORK BY MR.

ROLL NO. IN SEMESTER II OF FIRST YEAR OF MASTER IN

COMPUTER APPLICATION (MCA) IN THE COMPUTER LABORATORY

OF PCP CENTER SHREE RAM COLLEGE, BHANDUP FOR SUBJECTOPERATING SYSTEM DURING ACADEMIC YEAR 2013-14.

LECTURE IN CHARGE HEAD OF DEPARTMENT OF MCA

EXTERNAL EXAMINER


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3/21

Practical No. :1

Aim: To Study basic commands of Linux

$whoUser ttyl1 Apr 15 11:47

$who am iUser ttyl1 Apr 15 11:47

$pwd/home/user

$tty/dev/tty10

$unameUWIN-NT

$uname -aUWIN-NT user-0294fee (22062001)-5.12600 2600 il586

$uname -pI386

$uname -r(22062001)-5.12600

$uname -helpUname: -h: unknown optionUname: -e: unknown optionUsage: uname [-ailmnprsv][-S name]

$factor 15-ksh: factor: notfound [No such file or directory]

$bcBc 1.04Copyright (C) 1991,1992,1994,1997 Free Software Foundation, Inc.This is Free Software with ABSOLUTELY NO WARRANTY.For fetails type warranty./*Division*/10/2510.0/2510/2.5

4/*Multiplication*/


4/21

85*2170/*Square root*/Sqrt(121)11

/*Addition*/2.5+2.55.0/*Loop*/For(i=5;i


5/21

$ ls -l

total 3600

-rw-r--r-- 1 user None 52 Apr 16 11:12 newfile

$ touchUsage: touch [-ancfmv] [-r file] [-t|d time] [ date ] file ...

$ mkdir newdir

$ cd newdir


6/21

Practical No. :2

Aim : To study advanced commands of Linux

$ tree

-ksh: tree: not found [No such file or directory]

$ alias p='ping'

$ p 192.168.1.2

Pinging 192.168.1.2 with 32 bytes of data:

Reply from 192.168.1.2: bytes=32 time


7/21

D

E

H

$ grep A newfileMy name is Abc

$ grep s newfile

My name is Abc

I am a IDE student

My roll no is 123

$ grep a newfile

My name is Abc

I am a IDE student

$ grep Abc newfile

My name is Abc

$ grep My newfile

My name is Abc

My roll no is 123

$ du1 ./newdir

10

$ cat > emp.lst

9876|sam dsilva | director|23/04/2010/7000

7896|david fernando|director|15/09/2009|800

$ sed -n '1,2p' emp.lst



$ sed -n '1,2w temp' emp.lst

$ cat temp




8/21

Practical No. :3

Aim: Bash shell to rename the file which change in the suffix

$ ls -ltr

total 5

-rw-r--r-- 1 user None 174 Apr 16 11:48 emp.lst


-rw-r--r-- 1 user None 12 Apr 16 11:52 AtoH

drwxr-xr-x 2 user None 512 Apr 16 11:53 newdir

-rw-r--r-- 1 user None 174 Apr 16 11:54 temp

$ for file in *.lst; do

> ln=`basename $file .lst`

> mv $file $ln.txt

> done

$ ls -ltr

total 5

-rw-r--r-- 1 user None 174 Apr 16 11:48 emp.txt


-rw-r--r-- 1 user None 12 Apr 16 11:52 AtoH

drwxr-xr-x 2 user None 512 Apr 16 11:53 newdir-rw-r--r-- 1 user None 174 Apr 16 11:54 temp


9/21

Practical No. :4

Aim : gcc and g++ compiler program to find factorial of a number

$ cat > factorial.c

#include

int main()

{

int n,fact,i;

fact=1;

printf("Enter the no.");

scanf("%d",&n);

for(i=n;i>0;i--)

{

fact=fact*i;}

printf("\nFactorial of %d is %d\n',n,fact);

return 0;

}

Output:

gcc factorial.c

./a.outEnter the no. 5

Factorial of 5 is 120


10/21

Practical No. :5

Aim : gcc and g++ compiler program to find whether a number is prime or not.

$ cat > factorial.c

#include

int main()

{

int n,i;

printf("Enter the no.");

if(n==0)

{

printf("\nNumber is zero");

exit(0);

}if(n==1||n==2)

{

printf("\n%d is prime number",n);

}

else

{

for(i=3;i


11/21

Practical No. :6

Aim : Write a menu-driven program to display calendar, date , time , username,

name of the user displayed on x & y co-ordinates & terminal number.

$ cat > menu.sh

#!/bin/bash

echo "Your choice"

choice=1

while test $choice -ne 0

do

echo "choices are:"

echo "1. Print Calendar"

echo "2. Print date"echo "3. Print username"

echo "4. Terminal Number"

echo "0. Exit"

echo "Enter your choice:"

read choice

case $choice in

1) date;;

2) cal;;

3) who;;4) tty;;

0) exit;;

*) echo "invalid input"

esac

done

Output:

$ sh menu.sh

Your choice

choices are:

1. Print Calendar

2. Print date

3. Print username

4. Terminal Number

0. Exit

Enter your choice:

1

Sat Apr 16 12:49:41 IST 2011

choices are:1. Print Calendar


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13/21


14/21

Practical No. :8

Aim: Write a shell script to validate an entered date

$ cat > valid.sh

#!/bin/bash

echo "Enter the date to validate"

echo "DD"

read dd

echo "MM"

read mm

echo "YYYY"

read yyyy

if [ $dd -gt 31 ] ; thenecho "Invalid date"

elif [ $mm -gt 12 -o $yyyy -le 0 ]

then

echo "Invalid month"

elif [ $yyyy -gt 9999 -o $yyyy -le 999 ]

then

echo "Invalid year"

else

echo "Your date is valid"echo "$dd/$mm/$yyyy"

fi

Output:

$ sh valid.sh

Enter the date to validate

DD

06

MM

01

YYYY

1989

Your date is valid

06/01/1989

$ sh valid.sh

Enter the date to validate

DD

32MM


15/21


16/21

Practical No. :9

Aim: Write a shell script to calculate area of circle, rectangle, square and

triangle.

$ cat > area.sh

#!/bin/bash

echo "Your choice"

choice=1

while test $choice -ne 0

do

echo "Choices are: "

echo "1. Area of Circle"

echo "2. Area of Square"

echo "3. Area of Rectangle"echo "4. Area of Traingle"

echo "0. Exit"

echo "Enter your choice"

read choice

case $choice in

1) echo "Enter the radius"

read r

echo "The area of circle is "

echo 3.14\*$r\*$r | bc;;2) echo "Enter the side of square"

read side

echo "The area of square is "

echo $side\*$side | bc;;

3) echo "Enter the length"

read lr

echo "Enter the breadth"

read br

echo "The area of rectangle is "

echo $lr\*$br | bc ;;

4) echo "Enter the base length"

read bs

echo "Enter the height"

read hg

echo "The area of triangle is "

echo 0.5\*$bs\*$hg | bc ;;

0) exit ;;

*) echo "Invalid input";;

esacdone


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Output:

$ sh area.sh

Your choice

Choices are:

1. Area of Circle2. Area of Square

3. Area of Rectangle

4. Area of Traingle

0. Exit

Enter your choice 1

Enter the radius

1

The area of circle is

3.14

Choices are:1. Area of Circle

2. Area of Square


4. Area of Traingle

0. Exit

Enter your choice

2

Enter the side of square

4The area of square is

16

Choices are:

1. Area of Circle

2. Area of Square


4. Area of Traingle

0. Exit

Enter your choice

3

Enter the length

3

Enter the breadth

4

The area of rectangle is

12

Choices are:

1. Area of Circle

2. Area of Square3. Area of Rectangle


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19/21

Practical No. :10

Aim: To generate mark sheet using file handling

$ cat > db1

#!/bin/bash

i=2

while [ $i -le 6 ]

do

case $i in

2) sed -n '2w temp' database ;;





esacm1=`cut -d " " -f3 temp`

m2=`cut -d " " -f4 temp`

m3=`cut -d " " -f5 temp`

total=èxpr $m1 + $m2 + $m3`

i=èxpr $i + 1`

per=èxpr $total / 3`

echo "Total = $total, Percentage = $per"

done

$ cat > database

roll name m1 m2 m3

1 neha 80 90 90

2 seema 80 80 90

3 puja 70 90 80

4 priya 80 90 50

5 prachiti 60 80 70

Output:

$ sh db1

Total = 260, Percentage = 86






20/21

Practical No. :11

Aim : To write a script which accepts 2 strings, find the length of the string,

concatenate both the strings & print the string in reverse.

$ cat > stringfun.sh

#!/bin/bash

echo "Enter the string 1"

read str1

echo "Enter the string 2"

read str2

choice=1

while [ $choice -ne 0 ]do

echo "enter 1 => String length"

echo "enter 2 => String concatenation"

echo "enter 3 => Reversing the string"

echo "enter 0 => exit"

read choice

case $choice in

1) echo "The length of the first string is "

n=èxpr $str | wc -cècho $n

echo "The length of the second string is "

n=èxpr $str2 | wc -c`

echo $n

;;

2) echo "The concatenated string is "

echo $str1|$str2;;

3) echo "The reversed string is: "

z=ècho $str1 | wc -m`

while test $z -gt 0

do

echo -n ècho $str1 | cut -c $z`

done

;;

esac

done


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Output:

$ sh stringfun.sh

Enter the string 1

MumbaiEnter the string 2

Indians

enter 1 => String length

enter 2 => String concatenation

enter 3 => Reversing the string

enter 0 => exit

1

The length of the first string is

7

The length of the second string is8

enter 1 => String length

enter 2 => String concatenation


enter 0 => exit

2

The concatenated string is

MumbaiIndians

enter 1 => String lengthenter 2 => String concatenation


enter 0 => exit

0

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