Basic Linux Shell Scripting for DevOps Engineers.

1. What is Shell Scripting for DevOps?

   Shell scripting refers to writing a script in a text file containing writing a script in a text file that contains a series of commands, which can be executed by the shell. These commands can automate tasks.

   For Example: Backing up files, Installing software, Cleaning up old files, Monitoring system resources, and Automating repetitive tasks.

2. What is #!/bin/bash? can we write #!/bin/sh as well?

   The #!/bin/bash is the starting line for our script, which serves as an instruction to the system on which shell to use to execute the script. In this case, the #!/bin/bash shebang indicates that the Bash shell should be used to run the script.

   Yes, we can also use #!/bin/sh in our shell script. It is another type of shell that can be used in a shell script. However, it is worth noting that Bash has more features and capabilities than the Bourne shell.

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

    #!bin/bash
    #This script uses the echo command to print the string.
    echo "#90DaysOofDevOps challenge"
   

   

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

#!/bin/bash

echo "Let me find your lucky number, Eneter you name"

read name

number=007

echo "Your name is $name, and  You Lucky number would be $number"

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

#!/bin/bash
a=3
b=4
if [ $a >= $b ]
than
   echo " a is the greater than b "
else
  echo " b is not equal to a"
fi
#output:  a is greater than b