Apache htaccess Digest Authentication config

Suppose the http document directory is /var/www/html
Step 1
Then create .htaccess file in it
vi /var/www/html/.htaccess
AuthName  "myauth"
Authtype  Digest
AuthDigestProvider file
AuthUserFile /etc/httpd/conf.d/.digpass
Require valid-user

Step 2
issue the follow command to create login account
htdigest -c /etc/httpd/conf.d/.digpass myauth tom

ps.: Don't forget to change "AllowOverride AuthConfig" in httpd.conf