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Unattended Installation (aka Silent Install) of Sun JDK in Debian

Posting this short note to my blog in the hopes it may help someone else, as I had a hard time tracking this info down.

Debian provides a package (sun-java6-jdk) for installing the JDK, but when you have a situation where you need to do an unattended installation (aka “silent install”) of the JDK you are stuck, because the install insists on making you interactively accept Sun’s licensing agreement. Passing the -y option to apt-get has no effect. I was able to find a link on Sun’s site for doing silent installs on Windows, but nothing for Linux.

Fortunately, I eventually tracked down, all you have to do is the following before you run your apt-get install command:

echo sun-java6-jdk shared/accepted-sun-dlj-v1-1 boolean true | debconf-set-selections

This indicates to the installer hooks that you have already accepted the license agreement, and doesn’t give you the annoying EULA dialog.

UPDATE 11/3/09: I should note that all of the above research was in preparation for setting up an automated install with FAI. Unfortunately, I later found out, that while the above works great in the regular command line, due to the nature of the environment FAI installs run in, it doesn’t work for that. However, I also discovered there is a correct way of doing it with FAI.

Use “debconf preseeding”. Create a class file e.g. debconf/DEFAULT (I used debconf/easberry-vm-std-plt-01 for testing with my host class, and populate it with the following:

sun-java6-bin   shared/accepted-sun-dlj-v1-1    boolean true
sun-java6-jdk   shared/accepted-sun-dlj-v1-1    boolean true
sun-java6-jre   shared/accepted-sun-dlj-v1-1    boolean true

This accomplishes basically the same thing, but in the FAI environment. Success!

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