Ubuntu 10.04: installing java and the CGoban 3/KGS client
Now to get KGS working on the 10.04 machine….
First, java is needed:
sudo apt-get install openjdk-6-jre
A quick check of java -version tells me I’ve just installed
java version “1.6.0_18”
OpenJDK Runtime Environment (IcedTea6 1.8) (6b18-1.8-0ubuntu1)
OpenJDK Client VM (build 14.0-b16, mixed mode, sharing)
Then, I downloaded cgoban.jnlp from the KGS CGoban Download page by clicking the link entitled “CGoban for Java Web Start”.
I put this file on my desktop.
Run cgoban.jnlp by typing
javaws cgoban.jnlp
from the command line or double-clicking or right-clicking the file and choosing “Open with OpenJDK Java 6 Web Start”.
This causes a file called CGoban_3.desktop to appear on the desktop and opens CGoban 3 (which provides an option for connecting to KGS). The first time this runs, a security warning about digital signatures pops up; I ticked the “Always trust content from this publisher” box and clicked “Run”.
After this, CGoban and KGS can be accessed by double-clicking CGoban_3.desktop (or by right-clicking and selecting ‘Open’).
Doing this gave me an warning message:
Untrusted application launcher
The application launcher “CGoban_3.desktop” has not been marked as trusted. If you do not know the source of this file, launching it may be unsafe.
The only option was to ‘Cancel’ the launch.
To allow this to run, right-click CGoban_3.desktop and choose “Properties”. In the “CGoban 3 Properties” pop-up, choose the “Permissions” tab and click the box near the bottom that says “Execute: Allow executing file as program”. (This caused the file to display on my desktop as “CGoban 3” with a KGS go stone logo.)
Double-clicking (or right-clicking and choosing “Open”) now opens CGoban and allows one to connect to KGS.
The cgoban.jnlp file can now be deleted or moved elsewhere.
Note: I get a significant delay between clicking the icon and the CGoban main menu appearing – long enough that I tend to think I haven’t clicked properly or that something is broken. It is a muuuuuch longer delay than the unnoticeable pause I get between clicking and menu coming up in Ubuntu 8.04 with Java 1.5.0_22.
