./configure after I
tar'ed Linux version from here: http://arduino.cc/en/Main/Software
What exactly do you mean when you say that you can not run
It does not run, or it produces an error message?
Anyway, there are better ways to install arduino in Ubuntu. Please see http://playground.arduino.cc//Linux/Ubuntu.
If you still want to install (run) from the tgz file, please see the end of this answer. That part was added later on.
If you are impatient, press
After running the above, you will get a screen like this,
and then run,
This is supposed to give something like,
Press Y and then Enter. Things should go all right from this point. It went fine for me.
Added Later On, "For Installation from the tgz File"
Download the tgz file from http://arduino.googlecode.com/files/arduino-1.0.3-linux32.tgz
Unpack the file
Move to the extracted directory
Run the shell script in that directory
It ran perfectly in my machine, Ubuntu 12.04