Htpasswd
From NixTheWorld
htpasswd files are generally used in conjunction with .htaccess files to restrict user-access to specific directories from within apache.
To create a .htpasswd file:
# htpasswd -c /path/to/file/.htpasswd username New password: Re-type new password: Adding password for user username
To add additional users to that same existing .htpasswd file:
# htpasswd /path/to/file/.htpasswd otheruser New password: Re-type new password: Adding password for user otheruser
