Sometimes you want to download something but don't want to wait until it finishes so you can shut down the computer. In this case you can use Sentinella.

http://www.howtoforge.com/how-to-automatically-shut-down-your-computer-after-a-download-finishes

This tutorial explains how you can integrate ClamAV into PureFTPd for virus scanning on an Ubuntu 10.10 system. In the end, whenever a file gets uploaded through PureFTPd, ClamAV will check the file and delete it if it is malware.

http://www.howtoforge.com/how-to-integrate-clamav-into-pureftpd-for-virus-scanning-on-ubuntu-10.10

This tutorial is based on a LAN setup, but it should also be applicable for an Internet seedbox (e.g. on a vps or rootds), but some additional steps may need to be performed (firewall, securing rpc-mount, generally hardening of the server). The best lightweight software combination for a seedbox is lighttpd with rtorrent/libtorrent and a nifty web interface. So we use avalanche-rt, an actively developed project which looks very promising.

I needed to test serial communication between two VirtualBox guest machines on Linux. This tutorial describes what I did to set up a serial port between two virtual machines running on VirtualBox.

http://www.howtoforge.com/how-to-set-up-a-serial-port-between-two-virtual-machines-in-virtualbox

FTP is a very insecure protocol because all passwords and all data are transferred in clear text. By using TLS, the whole communication can be encrypted, thus making FTP much more secure. This article explains how to configure PureFTPd to accept TLS sessions on an Ubuntu 10.10 server.

http://www.howtoforge.com/how-to-configure-pureftpd-to-accept-tls-sessions-on-ubuntu-10.10