Linux/Cheese is a Linux worm which claims to be a "good virus". However, like other attempts before it, it fails and is an unwanted nuisance.
Linux/Cheese will only affect Linux systems previously infected with the Linux/Lion worm. When a machine is infected by Linux/Cheese it will extract the worm to the /tmp/.cheese directory. It will then blank any lines in /etc/inetd.conf which contain the text /bin/sh. (A line containing this text is added as a backdoor when a computer is infected with Linux/Lion.)
The worm will then scan for other computers with the backdoor left open by Linux/Lion.