htpasswd is used for allowing user to authenticate for a

particular web page. such as you are running 2 or more web

pages through virtual hosting or any other method and want

to provide access for any user to access a particular page

with authentication then you can use the htpasswd for

creating user authentication file. when you run the command

htpasswd with the option -c and -m for any user it will

create a file named htpasswd in which an entry for user name

and encrypted passswd will create.