Just a report: I just got success to make Octopus system here.
Octopus server (the PC): running on Ubuntu 11.10 Octopus terminal: running on plan9front well, Octopus is somewhat difficult to setup the system above. I still have some problem, such as: idle: can't get Plan9 idle. However, it now start to work, and I can learn more from now. Thanks nemo and others. Kenji