TO SET PASSWORD AUTHENTICATION WITH APACHE ON UBUNTU 16.04 USING .HTACCESS FILE

1.Install apache2
#apt-get install apache2

2.Create a Password file
We now have access to the htpasswd command. We can use this to create a password file that Apache can use to authenticate users. We will create a hidden file for this purpose called .htpasswd within our /etc/apache2 configuration directory.
#htpasswd -c /etc/apache2/.htpasswd arun

Leave out the -c argument for any additional users you wish to add:
#htpasswd  /etc/apache2/.htpasswd Rahul

If we view the contents of the file, we can see the username and the encrypted password for each record:
#cat /etc/apache2/.htpasswd
arun:$apr1$zgRuzA6/$RSvqTSJPxikIXEKxgYu4f0
rahul:$apr1$yX/HaM9G$S0vY8PfVef0JhG66xsCFq.

3.Configuring Access Control with apache2 configuration file:

#vi /etc/apache2/apach2.conf

Add the following entries

<Directory /var/www/html/test>

      Options Indexes FollowSymLinks

      AllowOverride All

      Require all granted

      AuthType Basic

      AuthName "Restricted Content"

      AuthUserFile /etc/apache2/.htpasswd

      Require valid-user

</Directory>

Before restarting the web server, you can check the configuration with the following command:

#apache2ctl configtest

Create a test folder inside /var/www/html/ and create a index file inside it

#echo “this is test page” > /var/www/html/test/index.html

#systemctl restart apache2

Try to acess test folder from browser. http://Your ip/test.We can see we can access without any authentication

4.Now create a .htaccess file inside test folder

#vi /var/www/html/test/.htaccess

AuthType Basic

AuthName "Restricted Content"

AuthUserFile /etc/apache2/.htpasswd

Require valid-user

5.Save the file and restart the apache 2 service

# systemctl restart apache2

Now access test folder http://yourip/test