keep name domain htaccess - apache

Question

I have a little problem. I have a hosting with piensasolutions and two domains. The first domain controls the hosting and the second use a domain parking.
Let a.com be the first domain and b.com be the second domain.
My domain parking for b.com allows me to redirect from b.com to a.com/folder, (where folder contains the web page where I want to point with b.com).
The problem is that I want to show b.com URL instead of a.com/folder URL, I am not sure if the problem is from piensasolutions because I tried several .htaccess files but I was not able to change the URL of the web browser. This was my last test which supposes to keep the original URL.
RewriteEngine On
RewriteCond %{HTTP_HOST} ^(www.)?a.com/folder/$
RewriteRule ^(.*)$ /a.com/folder/$1 [L]
RewriteCond %{HTTP_HOST} ^(www.)?b.com$
RewriteRule ^(.*)$ /b.com/$1 [L]
For additional information, I put the .htaccess file inside the a.com/folder. I am not sure about the redirection of piensasolutions.
If your are able to help me, I will be really grateful, and also if you have dedicated a couple of minutes even if you have not find the anwser.
Thank you!

Answer 1

I think that the best way is usig sites-avaiable.
First of all,
$ vi /etc/host
and copy the next line:
127.0.0.1 a
127.0.0.1 b
Then, create two new sites:
$ touch /etc/apache2/sites-avaiable/a
$ touch /etc/apache2/sites-avaiable/b
and edit them
$ vi /etc/apache2/sites-avaiables/a
<VirtualHost *:80>
ServerAdmin webmaster#localhost
ServerName a
DocumentRoot /your_path_to_server/a/folder
<Directory /your_path_to_server/a/folder/>
Options FollowSymLinks
AllowOverride All
Require all granted
</Directory>
</VirtualHost>
and
$ vi /etc/apache2/sites-avaiables/b
<VirtualHost *:80>
ServerAdmin webmaster#localhost
ServerName b
DocumentRoot /your_path_to_server/b
<Directory /your_path_to_server/b/>
Options FollowSymLinks
AllowOverride All
Require all granted
</Directory>
</VirtualHost>
and that's all. This should work.