Not sure if this has been mentioned before, but whilst security has been raised as a topic, here's a nice little app that I'd recommend everyone crons on a daily basis.
neteng-iain linux # emerge search rkhunter Searching... [ Results for search key : rkhunter ] [ Applications found : 1 ] * app-forensics/rkhunter Latest version available: 1.1.8 Latest version installed: 1.1.7 Size of downloaded files: 109 kB Homepage: http://www.rootkit.org/ Description: Rootkit Hunter scans for known and unknown rootkits, backdoors, and sniffers. License: GPL-2 (Damn, better update) rkhunter will perform a respectable number of checks on the host machine and warn of potential hazards. Regs. Iain.