Linux Shell Scripting Basic
I'm Proficient in a variety of DevOps technologies, including AWS, Linux, Python, Shell Scripting, Docker, Terraform, Jenkins, Git/GitHub, and Computer Networking. I have a strong ability to troubleshoot and resolve issues, and are consistently motivated to expand the knowledge and skills through exploration of new technologies.
Day 1 BashBlaze-7-Days-of-Bash-Scripting-Challenge
Welcome to Day 1 of the Bash Scripting Challenge! Today, we will cover the basics of bash scripting to get you started. Let's dive in:
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
#!/bin/bash
# This is a single-line comment
# that spans multiple lines
# but each line is treated as a separate comment.
echo "This is the main part of the script."
# You can also "comment out" blocks of code
# by adding # at the beginning of each line.
# This effectively disables the code.
# echo "This line will not be executed."
echo "Script execution completed."
#####################################################
: <<'COMMENT'
This is a multiline comment
that spans several lines
and explains the purpose of the script
COMMENT
echo "Hello, world!"
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.
echo”This is Rubeena khan ”
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.
#!/bin/bash
# Declare variables and assign values
name="John"
age=30
city="New York"
# Print the values of the variables
echo "Name: $name"
echo "Age: $age"
echo "City: $city"
Task 4: Using Variables
Now that you have declared variables, let's use them to perform a simple task. Create a bash script that takes two variables (numbers) as input and prints their sum using those variables.
#!/bin/bash
# Prompt the user to enter the first number
read -p "Enter the first number: " num1
# Prompt the user to enter the second number
read -p "Enter the second number: " num2
# Perform the addition operation
sum=$((num1 + num2))
# Print the result
echo "The sum of $num1 and $num2 is: $sum"
Task 5: Using Built-in Variables
Bash provides several built-in variables that hold useful information. Your task is to create a bash script that utilizes at least three different built-in variables to display relevant information.
#!/bin/bash
# Get the current user's username
username=$(whoami)
# Get the current date
current_date=$(date +"%Y-%m-%d")
# Get the current working directory
current_directory=$(pwd)
# Display relevant information
echo "Hello, $username!"
echo "Today is $current_date."
echo "You are currently in the directory: $current_directory"
Task 6: Wildcards
Wildcards are special characters used to perform pattern matching when working with files. Your task is to create a bash script that utilizes wildcards to list all the files with a specific extension in a directory
#!/bin/bash
# Prompt the user to enter the directory path
read -p "Enter the directory path: " directory_path
# Prompt the user to enter the file extension
read -p "Enter the file extension (e.g., txt, jpg, etc.): " file_extension
# List all files with the specified extension in the given directory
echo "Files with the .$file_extension extension in $directory_path:"
ls "$directory_path"/*."$file_extension"
Thanks
###############################################################
I have recreated the bash script :
#TASK 1:
# "#!/bin/bash" is called shebang,
# It is an interpreter which translate your Bash command into mashine language and redirect your command towards .bash
##################################################################################
#TASK 2:
#This "echo" command will tell the interpreter to print the string written in ""
echo "This is #BashBlaze-7-Days-of-Bash-Scripting-Challenge"
###################################################################################
#TASK 3:
#Variables are memory location identified by the name given by user used to store data of any type
var1="Ruby"
Var2="Devops"
#####################################################################################
#TASK 4 :
#we can input varible value from user and use read to store the value in varible to use it anytime in our script
echo "Enter two numbers "
num1=$1
num2=$2
addition=$num1+$num2
echo "Total of two number you have entered in $addition "
#####################################################################################
#TASK 5 :
#Using buit in varible : these are some variable whose values are already defined in linux system
echo "My current bash path - $BASH"
echo "Bash version I am using - $BASH_VERSION"
echo "PID of bash I am running - $$"
echo "My home directory - $HOME"
echo "Where am I currently? - $PWD"
echo "My hostname - $HOSTNAME"
#built in special commands
# first "$#" is used to print number of argument passsed at the time of script execution
echo '$#' $#
# Second "$@" is used to print what parameters were passed at the time of execution of file
echo '$@' $@
# third "$?" is used to check "was last command successfully executed , if answer is zero then "yes"
echo '$?' $?
#####################################################################################
#TASK 6:
#wildcard are special characters used to perform pattern matching when working with files.
mkdir wildcard
cd wildcard
touch dev_emp{1..5}.txt
touch prd_emp{6..10}.pdf
ls -la
rm *.txt
#############################################################################################
echo "This script is written by ruby "
echo "Thanks for reading untill last line "
echo "HAPPY LEARNING "
