How to pull up the second site on hosting?

Has its own domain (let it be name.ru). He leads on a home server on Debian with apache2 MySQL PHP.
It is the cloud.
here is /etc/apache2/site-enabled/000-default.conf config

<virtualhost *:80>
 # The ServerName directive sets the request scheme, hostname and port that
 # the server uses to identify itself. This is used when creating
 # redirection URLs. In the context of virtual hosts, the ServerName
 # specifies what hostname must appear in the request''s Host: header to
 # match this virtual host. For the default virtual host (this file) this
 # value is not decisive as it is used as a last resort host regardless.
 # However, you must set it for any further virtual host explicitly.
 ServerName www.name.ru
 Redirect /blog http://name.ru:81
 Redirect / https://name.ru/
 ServerAdmin admin@name.ru
DocumentRoot /var/www/owncloud

 # Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
 # error, crit, alert, emerg.
 # It is also possible to configure the loglevel for particular
 # modules, e.g.
 #LogLevel info ssl:warn

 ErrorLog ${APACHE_LOG_DIR}/error.log
 CustomLog ${APACHE_LOG_DIR}/access.log combined

 # For most configuration files from conf-available/, which are
 # enabled or disabled at a global level, it is possible to
 # include a line for only one particular virtual host. For example the
 # the following line enables the CGI configuration for this host only
 # after it has been globally disabled with "a2disconf".
 #Include conf-available/serve-cgi-bin.conf
</virtualhost>

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet

#BLOG
 <virtualhost *:81>
 ServerAdmin admin@name.ru
 DocumentRoot /var/www/blog
 ErrorLog ${APACHE_LOG_DIR}/error.log
 CustomLog ${APACHE_LOG_DIR}/access.log combined

 </virtualhost>

I want to put WordPress for yourself and bring it to either port 81 or as a subdomain. Tipo wiki.name.ru (but I do not know how, and I don't know how to do, but not important).
The point is that I can't go to the wrong address name.ru/blog
not 192.168.1.3:81 (local address)
not name.EN:81
and if all beat. To remove the redirects for example and put it on port 80 /var/www/blog, then WordPress is perfectly opens up its installation. How to be where to dig?

Solved the problem by creating another config file. Now appear a question, is there a possibility to connect to one hosting two sites. That is name.ru opens the cloud. And the second website from the same hosting were opened on wiki.name.ru