.htpasswd

.htpasswd is a flat-file used to store usernames and password for basic authentication on an Apache HTTP Server. The name of the file is given in the .htaccess configuration, and can be anything although ".htpasswd" is the canonical name. The file name starts with a dot, because most Unix-like operating systems consider any file that begins with dot to be hidden. This file is often maintained with the shell command "htpasswd" which can add, delete, and update users, and will properly encode the password for use (so that it is easily checked, but not reversed back to the original password).