install virtualmin error: /tmp directory is mounted noexec. installation cannot continue.

Hello,

I have followed many guides, especially: http://www.youtube.com/watch?v=ubzsU2hEfuw

I followed his exact steps, and got an error: /tmp directory is mounted noexec. installation cannot continue.

I know you you're supposed to edit something in the /tmp for the noexec but I don't even know the commands to access it without getting permission denied.

I have nothing of SSH commands to access certain files/edit. I followed what was needed through the process, but can someone tell me the exact commands without getting the permission denied?

I have been at this for 2 days and running out of time.

Thank you very much!