How to set up SSL certificate (not self-signed) on virtual host on Ubuntu?

[stiuvert0007]

/ssl/folder/domain_cer.crt
<VirtualHost *:443>
ServerAdmin you email
ServerName domian
DocumentRoot /var/sentora/hostdata/username/public_html/domain/
SSLEngine on
SSLCertificateFile /ssl/folder/domain_cer.crt
SSLCertificateKeyFile /ssl/folder/domain_key.key
SSLCACertificateFile /ssl/folder/intermediate.crt
SSLProtocol all -SSLv2 -SSLv3
SSLHonorCipherOrder on
SSLCipherSuite "EECDH+ECDSA+AESGCM EECDH+aRSA+AESGCM EECDH+ECDSA+SHA384 EECDH+ECDSA+SHA256 EECDH+aRSA+SHA384 EECDH+aRSA+SHA256 EECDH+aRSA+RC4 EECDH EDH+aRSA RC4 !aNULL !eNULL !LOW !3DES !MD5 !EXP !PSK !SRP !DSS !RC4"
<Directory '/var/sentora/hostdata/username/public_html/domain/'>
Options +FollowSymLinks -Indexes
AllowOverride All
Require all granted
</Directory>
</VirtualHost>

Paste this to Virtual Host Overide, change paths and thats it? Or where to put this please? That first row is right? Sorry for these questions bro but I made it so many times that I am crazy from this

I´m in the same situation as you. Can´t install PositiveSSL certificate from Comodo.
I´ve used this:

</virtualHost>


<virtualhost *:443>
ServerName tilabmx.com
ServerAlias  www.tilabmx.com
ServerAdmin hcmarcos@tilabmx.com
DocumentRoot "/var/sentora/hostdata/zadmin/public_html/tilabmx_com"
php_admin_value open_basedir "/var/sentora/hostdata/zadmin/public_html/tilabmx_com:/var/sentora/temp/"
php_admin_value suhosin.executor.func.blacklist "passthru, show_source, shell_exec, system, pcntl_exec, popen, pclose, proc_open, proc_nice, proc_terminate, proc_get_status, proc_close, leak, apache_child_terminate, posix_kill, posix_mkfifo, posix_setpgid, posix_setsid$
SSLEngine on
SSLCertificateKeyFile /etc/apache2/ssl/tilabmx_com.key
SSLCertificateFile /etc/apache2/ssl/tilabmx_com.crt
SSLCertificateChainFile /etc/apache2/ssl/tilabmx.com.ca-bundle
SSLProtocol -All +TLSv1 +TLSv1.1 +TLSv1.2
SSLCipherSuite ECDHE-RSA-AES256-SHA384:AES256-SHA256:RC4:HIGH:!MD5:!aNULL:!EDH:!A$
SSLHonorCipherOrder on
ErrorLog "/var/sentora/logs/domains/zadmin/tilabmx.com-error.log"
CustomLog "/var/sentora/logs/domains/zadmin/tilabmx.com-access.log" combined
CustomLog "/var/sentora/logs/domains/zadmin/tilabmx.com-bandwidth.log" common
<Directory "/var/sentora/hostdata/zadmin/public_html/tilabmx_com">
  Options +FollowSymLinks -Indexes
  AllowOverride All
  Require all granted
</Directory>
AddType application/x-httpd-php .php3 .php
ErrorDocument 500 /_errorpages/500.html
ErrorDocument 403 /_errorpages/403.html
ErrorDocument 404 /_errorpages/404.html
ErrorDocument 510 /_errorpages/510.html
DirectoryIndex index.html index.htm index.php index.asp index.aspx index.jsp index.jspa index.shtml index.shtm

 
In the custom entry of Virtual host Override with no results. I can acces http but https doesn´t work.
When I check port override to 443 apache stops working.