Installation of Java on the NAS under fun_plug

Today i’ve installed java on my NAS Device (a D-Link DNS-345) what i personally see as a highlight as i can now use software that was not available to me before. Oracle provides a “Java SE Embedded”, which is suitable for NAS devices thanks to its reduced memory footprint. For the following tutorial you need to have fun_plug installed!


Go to the Oracle Page and choose “ARMv5 Linux – Headless”. Now you will be redirected to a survey, where you have to enter Name, Prename, Mail, Organization and Role. Then you will receive the download-Link via E-Mail. Click on this Link and accept the license agreement.
Java SE Embedded
Copy the downloaded file (in my case its name was ejre-7u6-fcs-b24-linux-arm-sflt-headless-10_aug_2012.tar.gz, but that is subject to change) to the NAS. I’ve copied it to /mnt/HD/HD_a2/, please adapt the following commands if you copy it elsewhere.


First create a directory:

mkdir -p /ffp/opt/java

Then unpack the archive from before:

cd /ffp/opt/java
tar xvzf /mnt/HD/HD_a2/ejre-7u6-fcs-b24-linux-arm-sflt-headless-10_aug_2012.tar.gz

Now create a link to the unpacked directory (“ejre1.7.0_06”):

ln -s ejre1.7.0_06 jre

Now put it permanently into the environment variables:

echo "export PATH=/ffp/opt/java/jre/bin:\$PATH" >> /ffp/etc/profile.d/
chmod a+x /ffp/etc/profile.d/

Logout and Login into the NAS.


Check if it works:

java -version

This should display something like this:

java version "1.7.0_06"
Java(TM) SE Embedded Runtime Environment (build 1.7.0_06-b24, headless)
Java HotSpot(TM) Embedded Client VM (build 23.2-b09, mixed mode)