The Automated Certificate Management Environment (ACME) protocol is an essential communication protocol for simplifying the process of generating and managing SSL/TLS certificates, ensuring secure and encrypted connections online. is a popular and user-friendly shell script that streamlines the implementation of the ACME protocol for managing SSL certificates. This guide is perfect for beginners, providing a comprehensive and easy-to-follow introduction to and SSL certificate management.

Customizing the Terminal by Editing ~/.bashrc with Color

Before diving into, it's helpful to customize your terminal environment with colors for better readability and a personalized look. To do this, edit the ~/.bashrc file, which configures the terminal's appearance and behavior each time you open a new terminal session.

1. Using a text editor to open the ~/.bashrc file

Open a terminal and run the following command:

nano ~/.bashrc

This command will open the ~/.bashrc file using the 'Nano' text editor. You can similarly use your preferred text editor, such as 'vi' or 'gedit'.

2. Add color configurations to the ~/.bashrc file

Scroll to the end of the file and add the following lines:

# Add colors to the terminal
export PS1="\[\033[38;5;13m\]\d\[$(tput sgr0)\]\[\033[38;5;15m\] \[$(tput sgr0)\]\[\033[38;5;49m\]\t\[$(tput sgr0)\]\[\033[38;5;15m\] \[$(tput sgr0)\]\[\033[38;5;11m\][\[$(tput sgr0)\]\[\033[38;5;75m\]\u\[$(tput sgr0)\]\[\033[38;5;10m\]@\[$(tput sgr0)\]\[\033[38;5;199m\]\H\[$(tput sgr0)\]\[\033[38;5;11m\]]\[$(tput sgr0)\]\[\033[38;5;15m\] \[$(tput sgr0)\]\[\033[38;5;208m\]:\w\[$(tput sgr0)\]\[\033[38;5;15m\]\\$ \[$(tput sgr0)\]"

These lines add color configurations to your terminal.

Save and exit the ~/.bashrc file by pressing Ctrl + X (for 'Nano') and follow the prompts to confirm the changes.

3. Apply the new color configurations

Open a terminal and run the following command:

source ~/.bashrc

This command will apply the color changes you just made.

With the terminal color customization complete, you can now proceed with installation and configuration.

Effortless Installation of

1. Git-based installation for

  1. Install Git if not already installed, using the package manager for your operating system.
  2. Open a terminal and clone the repository using the command: git clone
  3. Navigate to the cloned repository with cd
  4. Run the installation script with ./ --install

2. Curl/Wget-based installation for

  1. Open a terminal and use the following command: curl | sh

3. Verify the installation

  1. Open a terminal and run the command --version to ensure is successfully installed.

Obtaining SSL certificates with

1. Understanding the importance of SSL certificates

SSL certificates are essential digital certificates that authenticate a website's identity and enable secure and encrypted connections to protect sensitive data.

2. Obtain the Certificate using HTTP validation:

  1. Open a terminal and enter the command: --issue --domain --webroot /path/to/your/webroot
  2. Replace with your actual domain name and /path/to/your/webroot with the path to your website's directory.

3. Obtain the Certificate using DNS validation:

  1. Open a terminal and enter the command: --issue --domain --dns dns_provider_name
  2. Replace with your actual domain name and dns_provider_name with your DNS provider's name.

Configuring Your SSL Certificate Settings Using

1. Configuring domains and subdomains for SSL certificates

To configure a subdomain, include --domain in the --issue command to request an SSL certificate for that subdomain.

2. Setting up automatic SSL certificate renewal with conveniently enables a daily cron job that checks for expiring SSL certificates, automatically renewing them once they are within 30 days of expiration.

Implementing SSL Certificates

1. Implement the SSL Certificate in the service

Run the following command in a terminal:

Apache Example --install-cert -d \
--cert-file      /path/to/certfile/in/apache/cert.pem  \
--key-file       /path/to/keyfile/in/apache/key.pem  \
--fullchain-file /path/to/fullchain/certfile/apache/fullchain.pem \
--reloadcmd     "service apache2 force-reload"

Nginx Example --install-cert -d \
--key-file       /path/to/keyfile/in/nginx/key.pem  \
--fullchain-file /path/to/fullchain/nginx/cert.pem \
--reloadcmd     "service nginx force-reload"
  1. Replace with your domain name, /path/to/cert.pem, /path/to/key.pem and /path/to/fullchain.pem with the paths to your desired certificate files, `` with your service name (e.g., nginx, apache).

Efficient SSL Certificate Management with

1. Listing and displaying SSL certificates using

  • To list all SSL certificates, run --list
  • To display specific SSL certificate details, run --list --domain

2. Manually renewing SSL certificates using

  • To renew an SSL certificate manually, run --renew --domain

3. Removing unwanted SSL certificates with

  • To remove an SSL certificate, run --remove --domain

Updating the script for optimal performance

1. Checking for updates

  • Run --upgrade to check for updates and install them.

Troubleshooting and Common Issues for

1. Resolving permission issues with

  • Ensure correct permissions for files and directories are set when facing permission-related errors.

2. Overcoming DNS challenges with

  • If a webroot-based SSL issuance fails, try using the DNS challenge method by adding --dns dns_provider_name to the --issue command.

Additional Resources for


This all-inclusive guide covers the installation, obtaining, configuration, implementation, and management of, making SSL certificate management a breeze. In addition, users can now customize their terminal with colors for better readability and visual appeal. With this information, users can confidently use for managing SSL certificates and enhancing security. Further exploration and learning are encouraged to achieve mastery in SSL certificate management.