#Day 4 Task: Basic Linux Shell Scripting for DevOps Engineers.

1) What is shell Scripting for Devops?

Shell scripting is a combination of commands written to automate the Repetitive task. the shell script will be executed in the shell. shell is Command line interpreter and it is a bridge between the kernel and the user. kernel is the heart of OS having two types.

• Mono for Linux

• micro for windows

Advantages of shell scripting

• The command and syntax are exactly the same as those directly entered in command line, so programmer do not need to switch to entirely different syntax

• Writing shell scripts are much quicker

• Quick start

Interactive debugging etc

2) What is #!/bin/bash?

#!/bin/bash : It is called as she-bang. It is used to instruct the operating system to use bash as a command interpreter./bin/bash is a more feature-rich shell that includes many additional features and extensions

3) Can we write #!/bin/sh as well?

Yes we can use #!/bin/sh. It is used to execute the file using sh, which is a Bourne shell, or a compatible shell.

4)Write a Shell Script which prints I will complete #90DaysOofDevOps challenge.

5) Write a Shell Script to take user input, input from arguments and print the variables.

#!/bin/bash
echo  "enter the name"
read name
echo "enter the surname"
read surname
echo "my name is $name $surname"

6) Write an Example of If else in Shell Scripting by comparing 2 numbers.

    #!/bin/bash
    num1=80
    num2=20
    if [ $num1 -gt $num2 ]
    then
      echo "$num1 is greater than $num2"
    else
      echo "$num2 is greater than $num1"
    fi

thanks for reading,

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