Linux:Shell Scripts

feri@aries:~$ mcedit proba.txt

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• Create a program that assigns a value to variable named A and then shows its value.

#!/bin/bash
A=12
echo "A=$A"

• Create a program that asks for the user's name from the keyboard and greets him in person!

#!/bin/bash
echo -n "Your name: "
read NEV
echo "Nice to see you, $NEV"

• Create a program that prints the English abbreviation of today's name! The name of the current day can be obtained by properly parameterizing the date command. (Use the man page of the date command!)

#!/bin/bash
CURRENT_DATE=`date '+%a'`
echo "The name of the day is: $CURRENT_DATE"

• Create a program that asks the length of the side of a square and then displays its perimeter and area. The name of the program should be square!

#!/bin/bash
echo "Perimeter and area"
# Ask the length
echo -n "Length of a side: "
read SIDE
# Count the perimeter and area
PER=`expr $SIDE \* 4`
AREA=`expr $SIDE \* $SIDE`
# Show the result
echo "The perimeter is $PER, area is $AREA of a $SIDE square."