1. In httpd.conf (Directory "/var/www/htdocs"):
        AllowOverride AuthConfig   

2. htpasswd -c /etc/httpuser ingolf

3. cd /var/www/htdocs && vi .htaccess:
        AuthName MembersOnly    
        Authtype Basic         
        AuthUserFile /etc/httpuser   
        require user ingolf


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I.S.