Understanding Kaminsky's DNS Bug

See the linux journal for a very good explanation

If you are impatient or do not want to read the explanation
just go to doxpara.com and select the 'Check My DNS' button.

Eclipse on ubuntu throws ClassNotFoundException

I have just performed a fresh install on my pc with the latest ubuntu 7.10 (Gutsy Gibbon). After installing Eclipse I got the following Exception java.lang.ClassNotFoundException: org.eclipse.core.runtime.Plugin

The problem is that the default java that is installed is not compatible.

ls -l /usr/bin/java
lrwxrwxrwx 1 root root 22 2008-02-26 14:52 /usr/bin/java -> /etc/alternatives/java

The solution is to install the latest version of java from www.sun.com
and change the java link in /usr/bin. I installed this in /tools/java6 and then created a link called java

cd /tools
sudo ln -fs /tools/java6 java
cd /usr/bin
sudo mv java java_alternatives
sudo ln -fs /tools/java/jdk/bin/java