Shell scripting exercises

Create a new directory bash_scripts where you will run the shell scripting exercises.

mkdir  bash_scripts
cd bash_scripts

Note, it is recommended to create a new script file for every exercise; make them executable; give them names with extension .sh -- it is just a convention rather than a must. The first line of a bash script starts with

#!/bin/bash

All non-executable comments in a script are prepended with #

# For example, we list all the files in the current directory
ls -la
ls -l /etc  # Comment. Here, we list files in /etc directory

Script scr1.sh is like a calculator:

#!/bin/bash
echo "I will work out X*Y"
echo "Enter X"
read X
echo "Enter Y"
read Y
echo "X*Y = $X*$Y = $[X*Y]"

Make the script executable and run

chmod 755 scr1.sh
./scr1.sh