Installing JDK 6 on Ubuntu 12.04
This afternoon I wanted to get a few things going on the new Rackspace Cloud Server Joel had reconfigured to run Ubuntu 12.04. Specifically, I wanted to get the latest JDK 1.6.0 installed on the box as we need that for Mingle, which is the point of all this reconfiguration and such.
As it turns out, it's not that bad you just have to know where to go and what to get, and what to do with it. Isn't that the same thing with all new software for linux? Yes.
OK, first, get the latest JDK 6 download from Oracle here. Then it's a simple matter of unpacking it:
$ chmod +x jdk-6u32-linux-x64.bin $ ./jdk-6u32-linux-x64.bin
Then you need to move that to someplace useful. For me, that's /usr/local and then make a few symlinks to make it easy to upgrade:
$ sudo mv jdk1.6.0_32 /usr/local/ $ cd /usr/local $ sudo ln -s jdk1.6.0_32 jdk1.6 $ sudo ln -s jdk1.6.0_32 jdk
Then we can put it into the path using the alternatives system on Ubuntu 12.04:
$ sudo update-alternatives --install /usr/bin/javac javac /usr/local/jdk1.6/bin/javac 1 $ sudo update-alternatives --install /usr/bin/java java /usr/local/jdk1.6/bin/java 1 $ sudo update-alternatives --install /usr/bin/javaws javaws /usr/local/jdk1.6/bin/javaws 1
and then set the default JDK (if needed):
$ sudo update-alternatives --config javac $ sudo update-alternatives --config java $ sudo update-alternatives --config javaws
Finally, we can verify that the JDK was installed properly:
$ java -version java version "1.6.0_32" Java(TM) SE Runtime Environment (build 1.6.0_32-b05) Java HotSpot(TM) 64-Bit Server VM (build 20.7-b02, mixed mode)