Login to cPanel, click the File Manager and navigate to the document root of your (sub)domain. If you didn't set it explicitly, this is the 'public_html' folder.
Create a new folder, eg, admin and enter it.
Upload the ZIP file you have downloaded in the first step and close the window once it's completely uploaded.
Select the ZIP file and click the 'Extract' button. If you don't see the ZIP file, click the refresh button once.
Once extracted, close the File Manager and click MySQL Databases in cPanel.
Create a database.
Create a new database user and be sure to write down the corresponding password.
Add the user to the database, and tick the 'All privileges' mark.
Head over to yourdomain.com/admin (where admin is the folder you've created earlier) and enter the details. The database host is most likely localhost.
If you have FTP access, unzip the file locally and use your FTP client to upload the files to a subdirectory.
Get your database ready, if you don't know the details, contact your hoster.
Head over to yourdomain.com/admin (where admin is the folder you've created earlier) and enter the details. The database host is most likely localhost.
Transfer the downloaded ZIP over to your VPS, using scp or rsync (eg: scp filename.zip [email protected]:/home/user)
Create a new folder within the document root and move the file over (eg: mkdir -p /var/www/html/admin && cp ~/filename.zip /var/www/html/admin).
Unzip the file and set the directory owner to the web-user (eg: chown -R www-data:www-data /var/www/html/admin).
Create a new database and user with all the permissions on the database.
Head over to yourdomain.com/admin (where admin is the folder you've created earlier) and enter the details. The database host is most likely localhost.