Linux Automation

See video Linux Automation by DevOps01.

Arguments Example

Create file:

argumets_example.sh

echo "Number of argumets: $#"

echo "First argument: $1"
echo "Second argument: $2"

for arg in "$@"; do
    echo "Argument: $arg"
done

Run script in console with 4 arguments:

sh argumets_example.sh one 2 three 3+1

See the result:

Vars Example

Create file:

vars.sh

name="Alice"
age=30

echo "My name is $name and I am $age years old."

num1=10
num2=5
sum=$((num1 + num2))

echo "The sum of $num1 and $num2 is $sum."

Run script in console:

sh vars.sh

See the result:

Function Example

Create file:

func.sh

greet_user() {
    local name=$1
    echo "Hello, $name! Welcome to the Bash scripting world!"
}

greet_user "John"

Run script in console:

sh func.sh

See the result:

Loops Example (for, while, until)

Create file:

for_while.sh

for i in {1..5}; do
    echo "Iteration $i"
done

count=1
while [ $count -le 5 ]; do
    echo "While loop iteration $count"
    ((count++))
done

number=10
until [ $number -eq 0 ]; do
    echo "Until loop countdown: $number"
    ((number--))
done

Run script in console:

sh for_while.sh

See the result: