Updates (23/09/14): The steps given below are for 32-bit version of Ubuntu. To install Modelsim on 64 bit Ubuntu, please refer to this link.
What is Modelsim?
What is Modelsim?
- Modelsim is a hardware simulation and debug environment primarily targeted at smaller ASIC and FPGA design (Ref)
How do I install it?
- Download Modelsim Linux edition from here
- For more information visit me
- Go to the download location of the .run file and type chmod +x ModelSimSetup-13.1.0.162.run
- Visit me for more details
- Use the command ./ModelSimSetup-13.1.0.162.run install Modelsim
How do I start Modelsim?
- Change your directory to ‘Location_where_you_installed_Modelsim‘/altera/13.1/modelsim_ase/linuxaloem
- Type ./vsim
Verified on: Ubuntu 12.04 LTS
d-typist 
I get segmentation fault when I run the last line of code in terminal. How do I get around that?
I'm with the same problem. How I run Modelsim??
Can you please post how to install questasim in Ubuntu?
Here is an article I wrote on getting Modelsim running on 64 bit Ubuntu 14.04: http://mattaw.blogspot.com/2014/05/making-modelsim-altera-starter-edition.html
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Thanks a lot. It works now