certbot:tldr:d4613

This command is using the Certbot tool with sudo (which provides administrative privileges) to generate a test SSL certificate for a specific subdomain (--domain) using the webroot method (--webroot).

Here is the breakdown of the command:

• sudo: This is a command used in Unix-like operating systems to run a command with administrative privileges. It allows Certbot to execute commands that require elevated permissions.

• certbot: Certbot is a command-line tool used to obtain and manage SSL certificates from the Let's Encrypt certificate authority. In this case, it is being used to generate an SSL certificate.

• --webroot: This flag specifies the method to use for obtaining the SSL certificate. The webroot method requires you to place a specific file in the webroot directory of your subdomain to prove domain ownership.

• --webroot-path ${path-to-webroot}: This option sets the webroot path where the required verification file will be placed. You need to replace ${path-to-webroot} with the actual directory path on your system.

• --domain ${subdomain-example-com}: This option specifies the domain (subdomain) for which the certificate will be generated. You need to replace ${subdomain-example-com} with the actual subdomain name.

• --test-cert: This flag tells Certbot to generate a test certificate instead of a live, production-ready certificate. Test certificates have a shorter validity period and are useful for testing purposes or setting up initial configurations.

By running this command with the appropriate parameters, Certbot will verify domain ownership and generate a test SSL certificate for the specified subdomain using the webroot method.