Why patterns solve common automation needs in Bash Scripting - See It in Action

Why patterns solve common automation needs

📖 Scenario: You work as a system administrator. You often need to check disk usage on multiple servers and alert if usage is too high. Instead of writing new scripts every time, you use a common pattern to automate this task easily.

🎯 Goal: Build a simple bash script that uses a pattern to check disk usage and alerts if usage exceeds a set threshold.

📋 What You'll Learn

Create a variable with a sample disk usage value

Create a variable for the usage threshold

Use an if statement to compare usage with threshold

Print an alert message if usage is above threshold

💡 Why This Matters

🌍 Real World

System administrators often monitor disk usage to prevent servers from running out of space. Using this pattern, they can automate alerts and take action quickly.

💼 Career

Knowing how to write simple bash scripts with conditions is essential for automation tasks in IT and DevOps roles.

1

Create a variable with disk usage

Create a variable called disk_usage and set it to the value 85 to represent disk usage percentage.

Bash Scripting

# Create a variable called disk_usage and set it to 85
# Your code here

Need a hint?

Use disk_usage=85 to assign the value.

2

Set the usage threshold

Create a variable called threshold and set it to 80 to represent the alert threshold percentage.

Bash Scripting

disk_usage=85
# Create a variable called threshold and set it to 80
# Your code here

Need a hint?

Use threshold=80 to assign the value.

3

Compare disk usage with threshold

Use an if statement to check if disk_usage is greater than threshold. Inside the if, write a command to print "Alert: Disk usage is high!".

Bash Scripting

disk_usage=85
threshold=80
# Use if statement to check if disk_usage > threshold and print alert
# Your code here

Need a hint?

Use if [ "$disk_usage" -gt "$threshold" ] and echo inside.

4

Print the alert message

Run the script and print the alert message if disk usage is above threshold.

Bash Scripting

disk_usage=85
threshold=80
if [ "$disk_usage" -gt "$threshold" ]; then
    echo "Alert: Disk usage is high!"
fi
# Run the script to print the alert message

Need a hint?

Run the script using bash script.sh or execute the commands directly.