program vhdl in linux
I think the most VHDL-Tools runs under Linux! In the history the VHDL tools are Designed for Unix, in the last years mor developer of VHDL Software are switching to the windows platform.
Mostly you can download from the developer homepage a windows also a unix / Linux Version of the Software!
For what tools are you looking?? Then I can say you where you can find them. Mostly I think to Design with VHDL you need the following software:
Translogic Ease/Eale, ModelSim, Synplify and Quartus. All these tools runs under windows and linux.
Phytex