Ubuntu + scala REPL, Commands not typed on console

To fix the problem in the current scala repl session run:

import sys.process._
"reset" !

To fix the problem completely removed scala and install it with dpkg (not with apt):

sudo apt-get remove scala-library scala
sudo wget www.scala-lang.org/files/archive/scala-2.11.12.deb
sudo dpkg -i scala-2.11.12.deb