Hi,
which terminal are you using? And could you try to describe the symptoms? Are there error messages, what doesn't work?
I just tried a fresh installation of Ubuntu 14.04 and used the default terminal ('gnome-terminal').
And what kind of .NET version do you mean?
These simple steps are in general sufficient to download, build, and run Pash on Ubuntu:
> sudo apt-get install mono-complete git
> cd Pash/
> xbuild
> mono Source/PashConsole/bin/Debug/Pash.exe
But I think the trouble is caused by the incompatibility of Pash and your terminal application.
Regards,
Stefan