To start Octave, type 'octave' in the shell. It's easiest to perform this in your www directory so the files you create will be saved there.
liang-xue@codermerlin:~$ cd ~/www
You'll know you're in Octave when you see the Octave prompt.
To enable graphics plotting, execute the following command:
We'll begin with a 3-D example to demonstrate the power of Octave and how easy it is to create complex graphs.