htpasswd:tldr:76ca5

The command htpasswd is used to create and update user authentication files for basic authentication in Apache web server.

• ${filename} is a placeholder for the name of the authentication file or the path to the file. For example, if your filename is passwords or the file is located in /etc/apache2, you would replace ${filename} with either passwords or /etc/apache2/passwords.
• ${username} is a placeholder for the username you want to add or update in the authentication file. For example, if the username you want to add or update is john, you would replace ${username} with john.

By running the htpasswd ${filename} ${username} command, you are instructing the system to create or update the authentication file specified by ${filename} with the given ${username}. This command will prompt you to enter and confirm a password for the specified user. The system will then encrypt the password and add or update the user entry in the authentication file.