MCA UNIX Programming Practical University of Madras

/* 1.LICENCE */

CODING:

i=18

echo enter your age

read n

echo your age is $n

if [ $n -gt 18 ]

then

echo you are allowed to drive the car

fi

if [ $n -lt 16 ]

then

echo you are not allowed to drive the car

w=`expr $i - $n`

echo you have to wait for $w years

fi

OUTPUT:

user@ubuntu:~$ sh mk.sh

enter your age

20

your age is 20

you are allowed to drive the car

user@ubuntu:~$ sh mk.sh

enter your age

12

your age is 12

you are not allowed to drive the car

you have to wait for 6 years

/* 2.LEAP YEAR */

CODING:

echo enter the month

read m

echo enter the year

read y

if [ `expr $y % 4` -eq 0 -a `expr $y % 100` -ne 0 -o `expr $y % 100` -eq 0 -a `expr $y % 400` -eq 0 ]

then

echo $y is a leap year

if [ $m -eq 2 ]

then

echo No.of days in this month is 29

fi

else

echo $y is not a leap year

if [ $m -eq 2 ]

then

echo no of days in this month is 28

fi

fi

if [ $m -eq 1 -o $m -eq 3 -o $m -eq 5 -o $m -eq 7 -o $m -eq 8 -o $m -eq 10 -o $m -eq 12 ]

then

echo $y is a leap year

if [ $m -eq 2 ]

then

echo No.of days in this month is 29

fi

else

echo $y is not a leap year

if [ $m -eq 2 ]

then

echo no of days in this month is 28

fi

fi

if [ $m -eq 1 -o $m -eq 3 -o $m -eq 5 -o $m -eq 7 -o $m -eq 8 -o $m -eq 10 -o $m -eq 12 ]

then

echo no of days in this month is 31

fi

if [ $m -eq 4 -o $m -eq 6 -o $m -eq 9 -o $m -eq 11 ]

then

echo no of days in this month is 30

fi

OUTPUT:

user@ubuntu:~$ sh leap.sh

enter the month:2

enter the year:2000

2000 is a leap year

enter the month:6

enter the year:2012

2012 is a leap year

no of days in this month is 30

3.PRIME/ARMSTRONG/PERFECT

CODING:

echo enter a number

read n

i=2

flag=1

while [ $i -lt $n ]

do

c=`expr $n % $i`

if [ $c -eq 0 ]

then

flag=0

break

fi

i=`expr $i + 1`

done

if [ $flag -eq 1 ]

then

echo $n is prime

else

echo $n is not prime

fi

OUTPUT:

user@ubuntu:~$ sh pri.sh

enter a number:23

23 is prime

enter a number: 18

18 is not prime

/*B.ARMSTRONG NUMBER */

CODING:

echo enter the number

sum=0

read n

n1=$n

while [ $n1 -gt 0 ]

do

s=`expr $n1 % 10`

n1=`expr $n1 / 10`

sum=`expr $sum + $s \* $s \* $s`

done

if [ $sum -eq $n ]

then

echo $n is a armstrong no

else

echo $n is not a armstrong no

fi

OUTPUT:

user@ubuntu:~$ sh arm1.sh

enter the number

153

153 is a armstrong no

user@ubuntu:~$ sh arm1.sh

enter the number

154

154 is not a armstrong no

/*C.Perfect Number*/

CODING:

echo Enter the number

read n

dn=`expr $n \* 2`

i=1

sum=0

echo The divisors are

while [ $i -le $n ]

do

if [ `expr $n % $i` -eq 0 ]

then

sum=`expr $sum + $i`

echo $i

fi

i=`expr $i + 1`

done

echo sum = $sum

echo dn = $dn

if [ $sum -eq $dn ]

then

echo $n is  a perfect no

else

echo $n is not a perfect no

fi

OUTPUT:

user@ubuntu:~$ sh perfect.sh

Enter the number

28

The divisors are

1

2

4

7

14

28

sum = 56

dn = 56

28 is a perfect no

/*4.REVERSE ORDER*/

CODING:

x=" "

echo -n "numbers are :"

for n in $@

do

echo -n $n

echo -n " "

x="$n $x"

done

echo " "

echo -n "reverse order :"

echo $x

OUTPUT:

user@ubuntu:~$ sh revers.sh 1 2 3 4 5 6 7 8 9

numbers are :1 2 3 4 5 6 7 8 9

reverse order :9 8 7 6 5 4 3 2 1

/*5.HANDLING ARGUMENTS*/

CODING:

echo First arg is :$1

echo third argument :$3

echo tenth argument :${10}

echo total ags $#

echo the arguments are

for n in $@

do

echo -n $n

echo -n " "

done

shift

shift

shift

echo

echo the remaing no of args $#

for n in $@

do

echo -n $n

OUTPUT:

user@ubuntu:~$ sh parame.sh 1 2 3 4 5 6  7 8 9 10

First argument  is :1

third argument  is :3

tenth argument  is :10

total arguments: 10

the arguments are:

1 2 3 4 5 6 7 8 9 10

the remaining no of arguments are:

7 4 5 6 7 8 9 10

/*6.COPY REMOVE MOVE FILE*/  CODING:

Clear

echo "menu"

echo "1.copy a file"

echo "2.remove a file"

echo "3.move a file"

echo "4.quit"

echo "Enter your choice \c"

read choice

case "$choice" in

1)echo "Enter file name to copy \n"

read f1

echo "Enter file name \c"

read f2

if [ -f $f1 ]

then

cp $f1 $f2

else

echo "$f1 does not exist"

fi

;;

2)echo "Enter the file to be removed"

read r1

if [ -f $r1 ]

then

rm -i $r1

else

echo "$r1 file does not exist"

fi

;;

3)echo "Enter the file name to move \c"

read f1

echo "Enter destination \c"

read f2

if [ -f $f1 ]

then

if [ $f2 ]

then

mv $f1 $f2

fi

echo "$f1 does not exist"

fi

;;

4)echo "exit"

exit ;;

esac

OUTPUT:

menu

1.copy a file

2.remove a file

3.move a file

4.quit

Enter your choice 1

Enter file name to copy

one.sh

Enter file name two.sh

/*7.LOGIN OR NOT*/

CODING:

read u

if [ `who | grep -c $u` -eq 0 ]

then

echo "$u IS NOT LOGGED INTO THE SERVER !!!"

echo

exit 0

else

echo

echo "$u IS LOGGED INTO THE SERVER !!!"

echo

fi

OUTPUT:

user@ubuntu:~$ sh login.sh

u

u IS LOGGED INTO THE SERVER !!!

t

t IS LOGGED INTO THE SERVER !!!

/* 8.FILE PERMISSION */

CODING:

echo -n "Enter File Name :"

read file

[ -w $file ] && W="Write = Yes" || W="Write = No"

[ -x $file ] && X="Execute = Yes" || X="Execute = No"

[ -r $file ] && R="Read = Yes" || R="Read = No"

[ -d $file ] && D="Directory" || D="Directory = No"

echo "$file permissions"

echo "$W"

echo "$R"

echo "$X"

echo "$D"

OUTPUT:

user@ubuntu:~$ sh permission.sh

Enter File Name :per.sh

per.sh permissions

Write = Yes

Read = Yes

Execute = No

Directory = No

/*9. NEWS UPDATE*/

CODING:

echo enter 1 for the all news and 2 for new news

read n

if [ $n -eq 1 ]

then

echo this will display all news new and old news -a | more

fi

if [ $n -eq 2 ]

then

echo this will display only new news

news | more

fi

OUTPUT:

user@ubuntu:~$ sh news.sh

enter 1 for the all news and 2 for new news

1

this will display all news new and old news –a

/*10.  DOWNLOAD OR UPLOAD THE FILE*/

CODING:

echo enter the file name

read fn

echo enter 1 for upload 2 for download

read n

if [ $n -eq 1 ]

then

echo file is beeing uploaded

curl -K -F myfile=@one.sh -H `HTTP_AUTH_LOGIN:admin` -H `HTTP_AUTH_PASSWD:password` http://google.com

fi

if [ $n -eq 2 ]

then

echo file is beeing downloaded

curl $fn

fi

OUTPUT:

user@ubuntu:~$ sh download.sh

enter the file name

one.sh

enter 1 for upload 2 for download

1

file is beeing uploaded

/*11. CAT COMMAND*/

CODING:

echo enter the file name to display

read fn

echo enter the column no

echo another way to print the file content is

if [ $n -eq 1 ]

then

cat $fn | awk '{print $1}'

fi

if [ $n -eq 2 ]

then

cat $fn | awk '{print $2}'

fi

if [ $n -eq 3 ]

then

cat $fn | awk '{print $3}'

fi

OUTPUT:

user@ubuntu:~$ sh filedisplay.sh

enter the file name to display

one1.c

enter the column no

1

another way to print the file content is

#include

void

{

printf

}

user@ubuntu:~$ sh filedisplay.sh

enter the file name to display

one1.c

enter the column no

2

another way to print the file content is

<stdio.h>

main()

("hello");

/*12. SIMULATE FIND COMMAND*/

CODING:

read fname

i=`ls | grep -c $fname`

echo $i

if [ $i -eq 1 ]

then

echo

echo "$fname found!!!"

echo

exit 0

else

echo

echo "$fname not found!!!"

echo

fi

OUTPUT:

user@ubuntu:~$ sh find.sh

one.c

1

one.c found!!!

user@ubuntu:~$ sh find.sh

one.sh

0

one.sh not found!!!

/*13.REMOVE DUPLICATE WORDS */

CODING:

echo removing duplicate words

echo enter the file name

read fn

sort -u $fn

OUTPUT:

user@ubuntu:~$ sh thirteen.sh

removing duplicate words

enter the file name

two.txt

hello

world

/* 14. Electricity  Billing System */

awk '{print $1"\t" $2"\t" $3 "\t"$4"\t" $5"\t" $6}' ebhead.dat

awk '

     {

       { u = $3 - $4 }

       { a = u * 3 }

       {print $1"\t"$2"\t"$3"\t"$4"\t"u"\t"a"\t"}

       {c = 0;}

}' eb.dat

eb.dat

1000 sun 8787 8666

1001 sen 9999 9888

behead.dat

Number Name C-R P-R Unit RS 

Output

Number Name C-R   P-R     Unit   RS 

1000       sun    8787  8666    121    363

1001       sen    9999   9888    111    333

/*15. Student Mark List */

awk '{print $1"\t" $2"\t" $3 "\t"$4"\t" $5"\t" $6"\t" $7"\t" $8"\t" $9}' head.dat

awk '

     {

      for(i = 2; i<= NF; i++)

       { c = c + $i }

       { a = c / 5}

       {print $1"\t"$2"\t"$3"\t"$4"\t"$5"\t"$6"\t"$7"\t"c"\t"a"\t"}

       {c = 0;}

}' st.dat

st.dat

1000 sun 50 50 50 50 50

1001 sen 60 60 60 60 60

head.dat

Name No M1 m2 m3 m4 m5  total Avg

Output

Name No M1 m2 m3 m4 m5  total Avg

1000 sun  50  50  50   50  50    250   50

1001 sen 60   60  60   60  60     300  50