A sample code block:

$ docker compose up -d

Let’s break this down real quick.

• $ indicates that you are to type this command as a non-root user into a shell prompt (not a Windows command prompt)
• docker is the command we’re running
• In this case, we’re telling docker to use its compose subsystem to bring a service up, and run it in the background (the -d part)

We could also see something like:

# systemctl status nginx

The breakdown:

• # indicates that you need a root shell to run this command (again, not a Windows command prompt)
• systemctl is the command we’re running
• Here, we’re asking for the status of the nginx daemon