With this guide you can easily install JDownloader 2 (from now on JD2) on your nas Qnap, both version are supported, Arm and Intel!

Premise
This method is "fully" automated, just follow this simple step! This script install also the qpkg for your Qnap, so you can activate and deactivate it through the App Center on your Qnap system. This script is also Auto-Upgradable, so if new version of this script is released, it upgrade itself automatically!
Let's do it!

Requirements

• Nas Qnap!!!
• JRE from the App Center of your Qnap
• Optware or Entware-ng:
  For those who want to use Optware, I suggest this one:
  forum.Qnap.com/viewtopic.php?f=124&t=45769&hilit=ipkg+sl1000+download&start=30#p206927 sl1000
  and the relative fix:
  wiki.qnap.com/wiki/Install_Optware_IPKG#Fix_the_.24PATH_in_.2Fetc.2Fprofile
  For those who want to use Entware-ng, I suggest this one:
  forum.qnap.com/viewtopic.php?f=351&t=116737
• Have an account on my.jdownloader.org
• Have a minimum of familiarity with putty and some basic skills!

Here is the exact process , I recommend you follow it, step to step and you'll be fine

Installation

1. Download this script:
   dropbox.com/s/iaafkg38waduo4a/JD2_Qnap_installer.sh?dl=0
   WARNING: the script won't work out-of-the-box for older QNAP devices and needs manual changes, see
   https://board.jdownloader.org/showpo...&postcount=449
   Alternative version (1.38) of the script for older QNAP nas devices (modified to be hosted on our server):
   installer.jdownloader.org/3rdpartyqnap/JD2_Qnap_installer.sh
   Is the installation script, copy it on your nas, I suggest to copy it on the Public folder
2. Access through ssh at your Nas with Putty and go to the directory where you copied the installer script, in this case:
   

   cd `/sbin/getcfg Public path -f /etc/config/smb.conf`

3. Now you've to make it executable, so:
   

   chmod +x JD2_Qnap_installer.sh

4. Now you've to execute it, so:
   

   ./JD2_Qnap_installer.sh

5. Don't care about this error:
   

   Link service start/stop script: JDownloader2.sh
   Set QPKG information in /etc/config/qpkg.conf
    Checking for /opt...  Found!
   Unable to find JD2 in the folder: /share/CACHEDEV1_DATA/.qpkg/JDownloader2/JD2.

   It's normal, because JD2 is not yet installed!
6. Now, you've only to wait until you'll see
   

   |---------------------------Headless Information-------------------------------
   |       New Update available
   |       A new Update is available. Do you want to download it now?
   |       Enter y -> Download now
   |       Enter n -> Later
   y

   Obviously you have to insert y like me
7. Now, you've to wait until you'll see this request
   

   |---------------------------Headless Information-------------------------------
   |       MyJDownloader Setup
   |       Your 'My JDownloader' logins are not correct.
   |       Please check username/email and password!
   |       Enter y -> Enter Logins
   |       Enter n -> Exit JDownloader
   y
   |       Please Enter your MyJDownloader Email:
   ***************
   |       Please Enter your MyJDownloader Password:
   ***************

   This is an important step, you've to insert your log-in credentials to connect JD2 to the web service!
8. Now, you've only to wait until you'll see
   

   set  CONNECTED

   Now, manually, you've to do this combination of key, on your keyboard:
   

   CTRL+C

9. Done, remain just the last information that indicate that all is ok. This also make you a request, so press any key and then you can close the putty windows!
   

   ==========================================================================================
   All done!!! Remember to log-in to https://my.jdownloader.org/login.html and configure JD2!
   ==========================================================================================
   Ok, now press any key to continue, then you can terminate this ssh session. Have a Good Download!!!

Configuration

1. From now on all the configurations are via web, so log-in on my.jdownloader.org and go to the JD2 (Settings), then (Advanced Settings) and for 1st change the (Default Download Folder), remember that you've to input a path like that /share/Download, or other
   Important note that will be valid only from 1.31 version: If you don't want, don't know what is a path or simply if you skip this passage, all your download will be put on the default Qnap Download folder! So you need to change it only if you really need to change it!
2. Always from the (Advanced Settings) you've to reset the field (Browser Command Line)
3. If you don't have an account on 9kw.eu/register.html service make one on it, it's a captchas solver. The best thinks about it, is that if you don't want to buy some captcha credits, you can partecipate, solving some captchas and earn captcha credits!
4. Through the service my.jdownloader there is the 3 major mobile apps to controll JD2, just go at Mobile Apps! If you can't see it this's the links
   Android App:
   play.google.com/store/apps/details?id=org.appwork.myjdandroid
   Apple App:
   itunes.apple.com/de/app/jdanywhere/id683222457
   Windows phone App:
   windowsphone.com/de-de/store/app/file-recon/e40c41d0-3c94-4ed6-9fe8-66d4547a8ffe
5. Enjoy your new JD2 for Qnap :D

Hi Chryses,
nice job! I didn't test it yet, but it looks very promising.
Did you use the QDK to build the qpkg? If yes, where did you get?
I also wanted to have a look at it (just out of curiosity), but I couldn't get the QDK anywhere (all links on the QNAP page are not available anymore). The App Center of my TS-219P II doesn't contain it neither.
Is it only available for certain models?

Update: I found it myself. There is a valid link for QDK 2.2.4 in the quick start guide PDF.

Many tnx, sorry for the delay!
2.2.4? I'm still stuck at 2.2.2, that actually have some bug!

Yep is a mix of a qpkg and an external script that install all!

JD2 unfortunately does not work properly on QNAP ( my 453mini qts 4.2 )
after installation is all ok, but after a reboot does not work, you can start it manually but you can not connect to it through the site my.jdownloader.org.
Java works well, so i don't wny idea how fixit it.

[Jiaz]

I can help via Teamviewer if you want, contact us via support@jdownloader.org

When it works one, it should work always. After rebooting not working -> guess its simple setup issue

The script uses disown, but I think is not available on all system, so ... what do you think is better Jiaz, screen or disown?

@yabba235
can you write to me the output of this command?

disown

which screen

[Jiaz]

you dont need disown or screen
you can also use
su -c "command &" user
to start in background,would change it into that

I don't know why but, seems that
1. by default seems that all programs installed via qpkg run with admin
2. there is no sudo so no su command availabe, must be installed via ipkg
3. not all version of qnap have disown

I don't know why but seems that some peoples have some trouble to start jd2, ok during the installation phase if you close the ssh session and jd2 is not on background, but in theory if you go to the cpannel and start it again must works! But seems that is not true, and is strange.

So:
I tried to use screen, after a jd2 update screen wont works
Not all qnap have disown!

I've now 2 way
1. installing sudo via ipkg and run your command
2. installing coreutils via ipkg and run nohup

Qpkg updated to 1.32.
Introduced a double check on the pid file
Disabled disown command

Great work, love this alot...
I only have one issue... every time i close the ssh connection, jdownloader stops working...

Any ideas?

Hi, tnx.

First of all check that have the latest version 1.32

The ssh connection is only for the installing purpose, so you install jd2 via ssh and close the ssh session, if jd2 stop you need to go to the qnap app center and disable JDownloader2, the you can re-enable it, always from qnap app center

[Jiaz]

I helped him via teamviewer and installed coreutils -> to provide nohup and updated script to use nohup

Updated to 1.33
If launched via ssh connection, jd2 starts with screen and inform the user

@Chryses
thank you for the guide. Everything works perfectly.
Only thing i see is that my Qnap dont go in standby, do you think its jdownloader?
I also do a firmware upgrade on the Qnap.

[Jiaz]

This will be fixed by an update for JDownloader. We will fix this issue as soon as possible

Tnx. I think that is a "common" problem when you use programs that need to be always on activity and/or online. In my opinion this is better for the hd life, less start/stop cycle I mean.

Originally Posted by Jiaz

This will be fixed by an update for JDownloader. We will fix this issue as soon as possible

Any news?
There are some updates in last time, but problem is stil here.
If i turn off jdownloader in qnap, the harddisk spin down.

[Jiaz]

Its not the activity, it is the update check touching a file on disk.

Originally Posted by Chryses

Tnx. I think that is a "common" problem when you use programs that need to be always on activity and/or online. In my opinion this is better for the hd life, less start/stop cycle I mean.

Originally Posted by Jiaz

Its not the activity, it is the update check touching a file on disk.

Thank you, hope a update will solve this little problem.

I think i can update via Jdownloader Androis app, i see there is something like "update jdwonloader". No need to change something on the Qnap?

[Jiaz]

nothing to change jd will update itself and remote apps will inform about pending update