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For cPanel
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SSH to your cPanel server as root and run command
cd /usr/local/cpanel/whostmgr/docroot/cgi/
rm -rf /usr/local/cpanel/whostmgr/docroot/cgi/rvsitebuilderinstaller/
rm -f rvsitebuilderinstaller.tar
wget http://download.rvglobalsoft.com/rvsitebuilderinstaller.tar
tar -xvf rvsitebuilderinstaller.tar
rm -f rvsitebuilderinstaller.tar
mkdir /usr/local/cpanel/whostmgr/docroot/cgi/rvsitebuilderinstaller/packages
cd /usr/local/cpanel/whostmgr/docroot/cgi/rvsitebuilderinstaller/packages
wget http://download.rvglobalsoft.com/download.php/rvsdownload/scriptdownloadpackage.tar
tar -xvf scriptdownloadpackage.tar
/usr/local/cpanel/3rdparty/bin/php scriptdownloadpackage.php
Once complete download file manually, please follow the instruction in this link. https://www.rvsitebuilder.com/installation/
 
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For DirectAdmin
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SSH to your DirectAdmin server as root and run command
cd /usr/local/rvglobalsoft/rvsitebuilderinstaller/packages
wget http://download.rvglobalsoft.com/download.php/rvsdownload/scriptdownloadpackage.tar
tar -xvf scriptdownloadpackage.tar
php scriptdownloadpackage.php
Once complete download file manually, please follow the instruction in this link. https://www.rvsitebuilder.com/installation/