certbot:tldr:aa1dc

The command "sudo certbot renew" is used to automatically renew SSL/TLS certificates managed by Certbot.

Certbot is a free and open-source software tool used for managing SSL/TLS certificates on Linux servers. It simplifies the process of obtaining, renewing, and configuring SSL/TLS certificates, which are required for secure communication between a website and its users.

The "renew" subcommand is used to renew existing certificates that are close to expiration. When you run "sudo certbot renew" command, Certbot will check the expiration dates of all your currently installed certificates and renew any that are within 30 days of expiration. This command will automatically take care of the renewal process for you, without requiring any additional manual intervention.

The "sudo" part of the command is for running the command with superuser or administrator privileges. This is usually required because Certbot needs root access to interact with the necessary system files and services for certificate management.

It is common to run "sudo certbot renew" as a scheduled task, such as in a cron job, to regularly check for certificate expirations and renew them automatically.