jruby gem dependencies for rails 3.1.1

Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)

add to Gemfile.rb
gem 'execjs'
gem 'therubyrhino'

getting around the great chinese firewall

The easiest way to get around the Great Firewall is to use TOR. However TOR can be slow. The best way is to run your own http proxy and tunneling traffic encrypted through SSH.


Mac/Linux/Unix distributions usually already have an ssh client installed.
Create the ssh tunnel to the proxy server using the following command line:
% ssh -C username@server -L 8080:localhost:8000

Once you've successfully logged in, start a proxy server:
% ./proxy.py

You will see something like:

Any clients will be served...
Serving HTTP on 0.0.0.0 port 8000 ...

Next configure your web browser to use the proxy server which is browser dependent. Google on how to do this. You will need to configure your web browser to use "localhost" and port "8080" for the proxy server host and port.

grails tomcat plugin sym links

create scripts/Event.groovy:

eventConfigureTomcat = {tomcat ->
def ctx = tomcat.host.findChild(serverContextPath)
ctx.allowLinking = true
}

However when grails.app.context = "/", this doesn't work because the TomcatServer.groovy replaces "/" with ""


therefore, must change tomcat.host.findChild(serverContextPath) to tomcat.host.findChild("")

dojo build script

cp ~/sync/workspace/fulicious/fulicious.profile.js profiles/;./build.sh profile=fulicious action=clean,release releaseName=fulicious-dojo

x11vnc gdm

x11vnc -display :0 -auth /var/gdm/:0.Xauth

GeoPoint -> screen pixel

// Convert geo coordinates to screen pixels
Point screenPoint = new Point();
mapView.getProjection().toPixels(geoPoint, screenPoint);

rotate vertically ati graphics driver on ubuntu 10.10

proprietary ati graphics driver on ubuntu 10.10 is quirky. It prevents ubuntu from booting back up if dual monitor is rotated vertically.

The following message pops up on reboot:
udevd-work[110]: inotify_add_watch(6, /dev/dm-2, 10) failed: no such file or directory

Someone else had a similar problem
http://art.ubuntuforums.org/showthread.php?t=1524495

My solution was to boot with the monitors horizontally, make a backup copy of /etc/X11/xorg.conf. Ubuntu boots up fine when the monitors are set to horizontal position. Once booted, manually rotate the monitor using the ATI Catalyst Control Center. When the system is rebooted in this configuration, the udevd-work error message will show up again and prevent the system from booting.
To boot the system again, boot into recovery mode, replace /etc/X11/xorg.conf with the good backup.
Reboot and the udevd-work error message will go away. Now you can boot and log in as usual and manually rotate the monitors