Basic Linux Shell Scripting

Shell scripting is used to automate tasks that may be time-consuming and is the process of creating and executing a sequence of commands in a shell environment to automate tasks or perform specific operations.

#!/bin/bash is known as shebang, also we can write it as #!/bin/sh.

#!/bin/bash
echo "I will complete #90DaysOofDevOps challenge"
//this will create a shell script that prints I will complete #90DaysOofDevOps challenge

#!/bin/bash

read -p "Enter a value: " user_input

arg1=$1 arg2=$2

echo "User input: $user_input" echo "Argument 1: $arg1" echo "Argument 2: $arg2"
//this script will read user input and prints it

#!/bin/bash
read -p "Enter no1:" A
read -p "Enter no2:" B
if [ $A -gt $B ]; then
echo "A is greater than B"
else
echo "B is greater than A"
fi
//this script will compare 2 numbers and prints the greatest number