Shivam's Blog

Day 1 : Shell Scripting

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Shivam Anand
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3 min read

Task 1: Comments

In bash scripts, comments are used to add explanatory notes or disable certain lines of code. Your task is to create a bash script with comments explaining what the script does.

Task 2: Echo

The echo command is used to display messages on the terminal. Your task is to create a bash script that uses echo to print a message of your choice.

Task 3: Variables

Variables in bash are used to store data and can be referenced by their name. Your task is to create a bash script that declares variables and assigns values to them.

Task 4: Using Variables

Now that you have declared variables, let's use them to perform a simple task. Create a bash script that takes two variables (numbers) as input and prints their sum using those variables.

Task 5: Using Built-in Variables

Bash provides several built-in variables that hold useful information. Your task is to create a bash script that utilizes at least three different built-in variables to display relevant information.

Task 6: Wildcards

Wildcards are special characters used to perform pattern matching when working with files. Your task is to create a bash script that utilizes wildcards to list all the files with a specific extension in a directory.

Solution :

  1. Create a file using vi editor say day1.sh

  2. Write the code inside it

#Shebang or hashbang. It is the first line of a script file and is used to specify the interpreter that should be used to execute the script. 

#!/bin/bash

# Task 1: Comments
# This script demonstrates various bash scripting tasks with comments explaining each step.

# Task 2: Echo
echo "Welcome to the Bash Scripting Adventure!"

# Task 3: Variables
# Declare variables
name="Shivam Anand"
age=240
city="India"

# Task 4: Using Variables
num1=10
num2=20
sum=$((num1 + num2))
echo "The sum of $num1 and $num2 is: $sum"

# Task 5: Using Built-in Variables
echo "Current User: $USER"
echo "Home Directory: $HOME"
echo "Current Date: $(date)"

# Task 6: Wildcards
# List all files with .txt extension in the current directory
echo "Text files in current directory:"
ls *.txt

# List all files with "file" in the middle of the filename
echo "Files containing 'file' in the name:"
ls file*.txt

  1. Save and exit the file using 'ESC +:wq'

  2. Make the file executable

chmod +x day1.sh
  1. Run the file
./day1.sh
  1. See the output

Here is my day 1 solution for all the tasks, and I am attaching my GitHub repository for the same. I'm happy to take the challenge, let's wait for more exciting scripting.

Here is my solution repository: Github Link.

Thank you for taking out valuable time and effort to read till the very end. Feedback is always appreciated.

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