Startup scripts for automation in GCP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add a startup script to a Compute Engine instance metadata.

GCP

gcloud compute instances add-metadata my-instance --metadata startup-script=[1]

Drag options to blanks, or click blank then click option'

A"#!/bin/sh echo Startup script running"

B"#!/bin/bash echo Hello World"

C"#!/bin/bash echo Hello from startup script"

D"#!/bin/bash echo Instance started"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to quote the script string

Using incorrect shell syntax

The startup script must be a string with a valid shell script. Option C is a common example.

2fill in blank

medium

Complete the code to create a VM instance with a startup script that updates packages.

GCP

gcloud compute instances create my-vm --metadata startup-script=[1]

Drag options to blanks, or click blank then click option'

A"#!/bin/bash sudo apt-get update -y"

B"#!/bin/bash sudo yum update -y"

C"#!/bin/bash sudo pacman -Syu --noconfirm"

D"#!/bin/bash sudo zypper refresh"

Attempts:

3 left

💡 Hint

Common Mistakes

Using package managers not available on the OS

Omitting sudo for commands requiring root

On Debian/Ubuntu systems, the startup script to update packages uses apt-get update.

3fill in blank

hard

Fix the error in the startup script metadata to correctly run a script that installs nginx.

GCP

gcloud compute instances add-metadata web-server --metadata startup-script=[1]

Drag options to blanks, or click blank then click option'

A"#!/bin/bash sudo apt-get install -y nginx"

B"#!/bin/bash sudo apt-get install nginx"

C"#!/bin/bash sudo install nginx -y"

D"#!/bin/bash sudo apt-get install nginx -y"

Attempts:

3 left

💡 Hint

Common Mistakes

Placing -y after the package name

Using incorrect install commands

The correct apt-get install command places the -y flag before the package name to auto-confirm installation.

4fill in blank

hard

Fill both blanks to write a startup script that creates a file and writes text into it.

GCP

#!/bin/bash
echo [1] > /tmp/startup.txt
chmod [2] /tmp/startup.txt

Drag options to blanks, or click blank then click option'

A"Hello from startup script"

B755

C644

D"Startup script ran successfully"

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect permission numbers

Forgetting to quote the text string

The script writes a message to a file and sets permissions to 644 for read/write by owner and read by others.

5fill in blank

hard

Fill all three blanks to create a startup script that updates packages, installs nginx, and starts the service.

GCP

#!/bin/bash
sudo [1] update -y
sudo [2] install -y nginx
sudo systemctl [3] nginx

Drag options to blanks, or click blank then click option'

Aapt-get

Byum

Cstart

Dstop

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing package managers

Using systemctl stop instead of start

The script uses apt-get to update and install nginx, then starts the nginx service.