Nginx installation - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

Nginx service status after installation

After installing Nginx on a Linux system using the package manager, what is the expected output of systemctl status nginx if the service is running correctly?

Nginx

systemctl status nginx

A Active: active (running) since [date and time]; Main PID: [pid] (nginx)

B Active: inactive (dead) since [date and time]

C Unit nginx.service could not be found.

D Failed to start nginx.service: Unit not found.

💡 Hint

Check the service status after installation and starting the service.

When Nginx is installed and started successfully, systemctl status nginx shows it as active and running with a main process ID.

❓ Configuration

intermediate

Default Nginx configuration file location

Where is the default main configuration file for Nginx typically located on a standard Linux installation?

A /etc/nginx/nginx.conf

B /usr/local/nginx/nginx.conf

C /var/www/nginx.conf

D /home/nginx/nginx.conf

💡 Hint

Think about the standard configuration directory for system-wide services.

The main Nginx configuration file is usually located at /etc/nginx/nginx.conf on Linux systems installed via package managers.

🔀 Workflow

advanced

Correct order to install and start Nginx on Ubuntu

What is the correct order of commands to install Nginx and start its service on an Ubuntu system?

A 2,1,3,4

B 1,2,3,4

C 1,3,2,4

D 3,2,1,4

💡 Hint

Update package lists before installing, then start and enable the service.

First update package lists, then install Nginx, start the service, and enable it to start on boot.

❓ Troubleshoot

advanced

Error when starting Nginx: Address already in use

You try to start Nginx but get the error: bind() to 0.0.0.0:80 failed (98: Address already in use). What is the most likely cause?

A Firewall is blocking port 80

B Nginx configuration file is missing

C Another service is already using port 80

D Nginx is not installed properly

💡 Hint

Port 80 can only be used by one service at a time.

The error means some other service is already listening on port 80, so Nginx cannot bind to it.

✅ Best Practice

expert

Ensuring Nginx starts automatically after reboot

Which command ensures that Nginx will start automatically every time the system boots?

A sudo systemctl status nginx

B sudo systemctl start nginx

C sudo systemctl restart nginx

D sudo systemctl enable nginx

💡 Hint

Think about enabling services to run on boot.

systemctl enable nginx configures the system to start Nginx automatically on boot.