INSTALLING JAVA 7 ON DEBIAN SQUEEZE

For all of my servers I use Debian, however that distribution has a few problems, mainly the packages can be a bit behind the cutting edge.

Now this is usually a good thing if you are looking for stability – cutting edge software can have issues, especially from new features etc, so for a live environment you want something thats stable.

However, there does come a time when this can bite back. You either need a feature thats not in the standard repositories or in this case the version is now unsupported.

In Debian Squeeze it has Java 6 – but that was EOL’d a couple of months ago so is no longer supported by Oracle. The current version is Java 7 update 17.

So how do we get Java 7 installed?

Well it’s pretty easy to do, we just need to add another repository into apt and install it.

First the repository:

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sudo su - echo "deb http://ppa.launchpad.net/webupd8team/java/ubuntu precise main" | tee -a /etc/apt/sources.list echo "deb-src http://ppa.launchpad.net/webupd8team/java/ubuntu precise main" | tee -a /etc/apt/sources.list apt-key adv --keyserver keyserver.ubuntu.com --recv-keys EEA14886 apt-get update

What that does is to install the ubuntu ppa repository into apt, setup the public keys and then load the package lists.

Next we need to install it:

1	sudo apt-get install oracle-java7-installer

This will now download Oracle Java 7 and present you with a couple of screens about licensing. Just ok and accept it and it will now install.

That’s it. You now have Java 7 installed – but it’s not the default JDK (if you already had Java 6 installed). If you want it to be the default then there’s just one more thing to do:

1	sudo apt-get install oracle-java7-set-default

That’s a dummy package but it will make Java 7 the default on that machine. If you want to check then you can check:

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peter@titan ~ $ java -version java version "1.7.0_17" Java(TM) SE Runtime Environment (build 1.7.0_17-b02) Java HotSpot(TM) 64-Bit Server VM (build 23.7-b01, mixed mode)