Recently I stumbled upon this great seedbox script if you are running a low end VPS or dedi, In my experience configuring your server with rtorrent and rutorrent will only crash your seedbox if your configs are too low.
This is a script for low end vps/dedi based on transmission, does the job well for seedbox and easy to configure and start.
Below are the steps for configuring your low end seedbox
Login as root.
Run the following command
wget –no-check-certificate https://github.com/bull/seedbox-setup/raw/master/seedbox-setup.sh
Rest is pretty much interative , fill in the user name and password you want and you are done,
Please also do remeber that it is made for ubuntu based systems .