Послать файл с определенной скоростью

Принять можно с помощью wget --limit-rate=скорость.

trickle

Depends: libc6, libevent1
Description: user-space bandwidth shaper
 Trickle is a voluntary, cooperative bandwidth shaper. it works
 entirely in userland and is very easy to use.
 .
 The most simple application is to limit the bandwidth usage of programs.

пасиб