Flooder.Linux.Small.f or Small.f is a piece of malware designed for Linux. It is designed to flood servers with packets.
This malicious program uses the infected machine to transmit a large ammount of IP packets. The infector can customize the requests with a remote application. They are asked what IP to connect to, what port to use, and the ammount of packets that are to be sent. This can cause low performance of the servers, if enough packets are sent.
Kaspersky Labs, (SecureList): Article