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Dept. of CE B.Tech IV/II UNIX & Shell Prog. Lab 2012-13

UNIX Lab Sheet -1

Exercise 1:

1. List different commands to create a file called nuva.txt

2. Count number of characters, lines and words in nuva.txt

Exercise 2

1. Create directory nuva123

2. Copy the file nuva.txt in to nuva123 directory

3. Add some more information to nuva.txt

4. Rename file nuva.txt to NUVACE.txt

5. Delete the file nuva.txt.

6. Delete the Directory nuva123.

Exercise 3:

1. Write a command to change user password.

2. Write a command to check current user.

3. Write a command to show the entire process running with process id.

4. Display file content using different commands and observe differences.

5. Display all process in the system.

6. Display Directory content page by page

Exercise 4:

1. Show content of current directory with different options and observe

different outputs.

2. Change directories and check where you are. Notice where is your home

directory.

3. Write a command to exit from the terminal.

Exercise 5:

1. Check IP of your machine

2. Ping to your machine using IP

3. Ping to servers in Nuva

4. Trace route to your machine using IP

5. Trace route to servers in Nuva.

Exercise 6:

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1. Log into the Student

2. Use the cat command to create a file containing the following data. Call it

mutable use tabs to separate the fields

1425 ravi 15.65

4320 ramu 26.27

6830 sita 36.15

1450 raju 21.86

a. use the cat command to display the file, mytable

b. use the vi command to correct any errors in the file, mytable

c. use the sort command to sort the file my table according to the

first field. Call the sorted file mytable(same name)

d. print the file mytable

e. logout of the system

Exercise 1:

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1. List different commands to create a file called nuva.txt

2. Count number of characters, lines and words in nuva.txt

Sol:

3

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Exercise 2

1. Create directory nuva123

2. Copy the file nuva.txt in to nuva123 directory

3. Add some more information to nuva.txt

4. Rename file nuva.txt to NUVACE.txt

5. Delete the file nuva.txt.

6. Delete the Directory nuva123.

Sol:

Exercise 3:

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a. Write a command to change user password.

b. Write a command to check current user.

c. Write a command to show the entire process running with process id.

d. Display file content using different commands and observe differences.

e. Display all process in the system.

f. Display Directory content page by page

Sol:

Exercise 4:

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1. Show content of current directory with different options and observe

different outputs.

2. Change directories and check where you are. Notice where is your

home directory.

3. Write a command to exit from the terminal.

Sol:

Exercise 5:

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1. Check IP of your machine

2. Ping to your machine using IP

3. Ping to servers in Nuva

4. Trace route to your machine using IP

5. Trace route to servers in Nuva.

Sol:

Exercise 5:

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Log into the Student

Use the cat command to create a file containing the following data. Call it

mutable use tabs to separate the fields

1425 ravi 15.65

4320 ramu 26.27

6830 sita 36.15

1450 raju 21.86

1. use the cat command to display the file, mytable

2. use the vi command to correct any errors in the file, mytable

3. use the sort command to sort the file my table according to the first field.

Call the sorted file mytable(same name)

4. print the file mytable

5. logout of the system

Sol:

UNIX Lab Sheet -2

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Shell Scripts:

1. Shell Script to find out biggest number Among 3nubaers

2. Shell Script to Print N numbers

3. Shell Script to Perform Arithmetic operations using Case.

4. Shell Script to Swap 2 number without using 3rd.

5. Shell Script to find sum of digits of given number

6. Write a shell script to generate Fibonacci numbers from 1 to n

7. Shell Script to find factorial of given number

8. Shell Script to reverse given number

9. Write shell script to print prime numbers in a given range?

10. Shell Script to check given number is Magic number or not.

11. Shell Program to Sort an Array

UNIX Lab Sheet -2

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Program 1: Shell Script to find out biggest number among 3nubaers

#!/bin/bash

echo Enter 3 numbers with spaces in between

read a b c

l=$a

if [ $b -gt $l ]

then

l=$b

fi

if [ $c -gt $l ]

then

l=$c

fi

echo Lagest of $a $b $c is $l

OUTPUT:

Program 2: Shell Script to Print n numbers

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#!/bin/bash

for i in $(seq 5)

do

echo "Abdulla welcomes U $i time"

done

OUTPUT:

Program 3: Shell Script to Perform Arithmetic operations using Case.

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echo Enter two number

read a b

echo 1.Add 2.Sub 3.Mul 4.Div 5.Exit

read op

case $op in

1) c=èxpr $a + $b` ;;

2) c=èxpr $a - $b` ;;

3) c=èxpr $c=$a \* $b` ;;

4) c=èxpr $c=$a / $b` ;;

5) exit

esac

echo $c

OUTPUT:

Program 4: Shell Script to Swap 2 number without using 3rd .

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#!/bin/bash

echo "enter first number"

read a

echo "enter second number"

read b

echo "a before swapping is $a and b is $b"

#swapping

a=$((a+b))

b=$((a - b))

a=$((a-b))

echo "a after swapping is $a and b is $b"

OUTPUT:

Program 5: Shell Script to find sum of digits of given number

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echo "Enter number : "

read n

s=0

while [ $n -gt 0 ]

do

r=$(( $n % 10 ))

n=$(( $n / 10 ))

s=$(( $s + $r ))

done

echo "Sum of Digit is : $s"

OUTPUT:

Program 6: Write a shell script to generate Fibonacci numbers from 1 to n

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echo "Enter n for Fibonacci series: - "

read n

echo "Fibonacci series is: - "

echo "0"

echo "1"

i=0

j=1

c=2

while [ $n -gt $c ]

do

k=$(($i + $j))

i=$j

j=$k

echo $k

c=$(($c + 1))

done

OUTPUT:

Program 7: Shell Script to Finding factorial of a given number

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#!/bin/bash

# fact1

# Finding factorial of a given number

#

#!/bin/bash

echo "Enter a number"

read num

n=$num

fact=1

while [ $num -ge 1 ]

do

fact=`expr $num \* $fact`

num=$(($num - 1))

done

echo "Factorial of $n is = $fact"

OUTPUT:

Program 8: Shell Script to reverse given number

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echo -n "Enter number : "

read n

sd=0

rev=""

on=$n

while[ $n -gt 0 ]

do

sd=$(( $n % 10 ))

n=$(( $n / 10 ))

rev=$(echo ${rev}${sd})

done

echo "$on in a reverse order $rev"

OUTPUT:

Program 9 : Shell script to print prime numbers in a given range.

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echo enter a range

read rng

echo 2

j=3

while test $j -le $rng

do

i=2

x=èxpr $j - 1`

while test $i -le $x

do

if [ èxpr $j % $i` -ne 0 ]

then

i=èxpr $i + 1`

else

break

fi

done

if [ $i -eq $j ]

then

echo $j

fij=èxpr $j + 1`

done

OUTPUT:

Program 10: Shell Script to check given number is Magic number or not.

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OUTPUT:

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Program 11: Shell Program to Sort an Array

clear

echo "Enter number of elements: "

read n

echo "Enter array elements: "

for ((i=0; i

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Lab Sheet -3

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Program 1: Write A shell script that takes a command line argument and reports

on whether it is directory, a file, or something else

Program 2: Write a shell script that computes the gross salary of a employee

according to the following

a) If basic salary is 1500 then HRA 500 and DA =98% of the basic The basic

salary is entered interactively through the key board

Program 3: Write a shell script which receives two files names as arguments. It

should check whether the two file contents are same or not. If they are same then

second file should be deleted.

Program 4: Write a shell script that displays a list of all files in the current directory

to which the user has read write and execute permissions

PROGRAM 5: Develop an interactive script that asks for a word and file name and

then tells how many times that word occurred in the file.

PROGRAM 6: Write a shell script to perform the following string operations.

1) To extract a sub string from a given string2) To find the length of a given string

Program 7: Write a C program that takes one or more file or directory names as

command line input and reports the following information on the file.

Program 8: Write C program that simulate the following unix commands

(a) mv

(b) cp

Program 9: Write a c program that simulates ls command

(Use system calls /directory API)

Lab Sheet -3

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Program 1: Write A shell script that takes a command line argument and

reports on whether it is directory, a file, or something else

echo "Enter a file name:"

read f

if [ -f $f ]

then

echo "File"

elif [ -d $f ]

then

echo "Directory"

else

echo "Not"

fi

Output:

Directory

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Program 2: Write a shell script that computes the gross salary of a

employee according to the following

a) If basic salary is 1500 then HRA 500 and DA =98% of the basic The

basic salary is entered interactively through the key board

echo " Enter the Salary "

read sal

if [ $sal1500]

hra=500

da=expr $sal*98/100

gsal=expr $sal+$hra+$da

gross=`expr $sa + $da + $hra`

fi

fi

Output:

Program 3: Write a shell script which receives two files names as

arguments. It should check whether the two file contents are same or not.

If they are same then second file should be deleted.

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echo "Enter I File Name:"

read f1

echo "Enter II File Name:"

read f2

d=`cmp $f1 $f2`

d1=""

if [ $d -eq $d2 ]

then

echo "Two Files are similar and $f2 is deleted"

rm $f2

else

echo "Two Files differ each other"

fi

Output:

Program 4: Write a shell script that displays a list of all files in the current

directory to which the user has read write and execute permissions

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# File Name : list.sh

#!/bin/bash

read -p "Enter a directory name : " dn

if [ -d $dn ]; then

printf "\nFiles in the directory $dn are :\n"

for fn in `ls $dn`

do

if [ -d $dn/$fn ]; then

printf " Directory "

elif [ -f $dn/$fn ]

then

printf "$fn File "

fi

if [ -r $dn/$fn ]; then

printf " Read"

fi

if [ -w $dn/$fn ];then

printf " Write"

fi

if [ -x $dn/$fn ];then

printf " Execute"fi

printf "\n"

done

else

printf "\n$dn not exists or not a directory"

fi

Output:

PROGRAM 5: Develop an interactive script that asks for a word and file

name and then tells how many times that word occurred in the file.

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# File Name : wcount.sh

#!/bin/bash

read -p "Enter a file name : " fn

if test -f $fn

then

echo "The contents of the file $fn is :"

cat $fn

echo "No. of Line : `wc -l $fn`"

echo "No. of Words : `wc -w $fn`"

echo "No. of Characters: `wc -c $fn`"

else

echo "$fn is not exists or not a file"

fi

Output:

PROGRAM 6: Write a shell script to perform the following string perations.

1) To extract a sub string from a given string

2) To find the length of a given string

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Print Enter the String:\c

read strIn

strlen=${# strIn}

print the string length is : $strlen

$ strlen.scr

Output:

Enter the String: Now is the time

The String length : 15

Program 7: Write a C program that takes one or more file or directory

names as command line input and reports the following information on the

file.

a) file type

b) number of links

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c) read, write and execute permissions

d) time of last access (Note: use /fstat system calls)

#include

main()

{

FILE *stream;

int buffer_character;

stream=fopen(test,r);

if(stream==(FILE*)0)

{

fprintf(stderr,Error opening file(printed to standard error)\n);

fclose(stream);

exit(1);

}

}

if(fclose(stream))==EOF)

{

fprintf(stderr,Error closing stream.(printed to standard error)\n);

exit(1);

}return();

}

Output:

Program 8: Write C program that simulate the following unix commands

(a) mv

(b) cp

/* File Name : bspace1.c */

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#include

#include

#include

main(int argc,char *argv[])

{

FILE *fp;

char ch;

int sc=0;

fp=fopen(argv[1],"r");

if(fp==NULL)

printf("unable to open a file",argv[1]);

else

{

while(!feof(fp))

{

ch=fgetc(fp);

if(ch==' ')

sc++;

}

printf("no of spaces %d",sc);

printf("\n");fclose(fp);

}

}

Output:

Program 9: Write a c program that simulates ls command

(Use system calls /directory API)

#include

#include

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#include

main(int argc,char *argv[])

{

int fd,i;

char ch[1];

if (argc0)

printf("%c",ch[0]);

close(fd);

}

}

Output:

unix--record 2012-13.doc

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