DSM-G600, DNS-3xx and NSA-220 Hack Forum

Ok I am confused with the default download directory setup, I get the same permission denied error mentioned in the last few pages.

Tutorial mention
chown -R nobody /mnt/HD_a2/Downloads

But in transmission default is
/home/nobody/Downloads

Is it the same location?

Also I thought transmission would create automatically the directory specified in preferences but the log is showing it's not able to.

fab wrote:

Ok I am confused with the default download directory setup, I get the same permission denied error mentioned in the last few pages.

Also I thought transmission would create automatically the directory specified in preferences but the log is showing it's not able to.

I'm pretty sure Transmission created the directories for me and I didn't have to mess with permissions, but I guess it depends on your setup, permissions, the user you are logged in as and where you are trying to install it.

Did you try creating the directory manually and setting the permissions?

Last edited by FunFiler (2010-09-04 13:17:51)

fab wrote:

Ok I am confused with the default download directory setup, I get the same permission denied error mentioned in the last few pages.

Tutorial mention
chown -R nobody /mnt/HD_a2/Downloads

But in transmission default is
/home/nobody/Downloads

Is it the same location?

Also I thought transmission would create automatically the directory specified in preferences but the log is showing it's not able to.

All the issues with permissions and user rights comes down to the fact that in Linux, some users can "do" more than others.

I really don't want to write a comprehensive "Guide to Linux user rights", there are other sites that do it way better than me, so here are the basics.

Let's use an example: We have a folder called "MyFolder" which is owned by the user "foo" and the usergroup "bar".
The folder rights are 0750 (or rwxr-x---).
The rights mean that the user ("foo")  has full rights. (read, write, execute), the group bar can read and execute, but not write, and everyone else can't do anything (not even look inside  the folder).

Now the user 'root' is a special case. It can do basically everything. It can look inside above folder, read the content of its files, and create new files as well. It's the ultimate account.

Now when you log onto the NAS via Telnet, by default everything you do is done as user 'root'.

When you start Transmission from the commandline, like so:

$ transmission-daemon -f -g /mnt/HD_a2/.transmission-daemon ...

It will run as root. And all the files and folder Transmission creates automatically will belong to the user root.

Here's the catch: Only the user 'root' can access files and folders owned by 'root'. Noone else can.
So when you first start Transmission like above, and later on decide Transmission can run as a different user, you will get your "Permission denied" errors.

The startup script for Transmission by default starts the app as user "nobody", which is kind of a special case itself. It has very low rights, but people here prefer it because you can delete files and folders from within Windows when they are owned by the user "nobody".
(I don't know why that is, and personally don't run as "nobody", but that's just personal preference).

So the big no-no here is to never run Transmission as different users. Either always run as root, or always run as "nobody". (Or any other user you want).

Running as root is "potentially dangerous", because if someone ever finds some exploit in Transmission, it may provide them with root access to the rest of the machine. So far nothing like that ever happened, but you never know.

Running as "nobody" is only necessary if different people with different logins access the NAS, and all those people delete/move files and folders that Transmission created.
If only one person is allowed to do that task (like in my case), run Transmission as that user, and all should be fine.



I hope this helps some, and if anyone ever finds out how to permalink to posts, let me know and I'll add a link to the first post :)

You didn't tell Transmission where to download files to. Transmission uses your home folder as download folder by default, and the default home folder is /home/root, which sits on the internal flash of the NAS and is anything but large

Remove all torrents, then quit Transmission, then do this:

$ su nobody -c "transmission-daemon -f -g /mnt/HD_a2/.transmission-daemon -w /mnt/HD_a2/Downloads"
(Transmission starts, wait a while, then press Ctrl-C, like described in the first post)
$ /ffp/start/transmission.sh start

This should do the trick.

How do you set the Seed ratio limit? I can't seem to find that option in the Web UI

/Edit

Nevermind found the option in the json

Need to figure out how the blocklist works now

Last edited by fab (2010-09-04 22:04:32)

A bit of offtopic, but... uTorrent for Linux alpha is out. But, it requires 2.6.13+ kernel

it has no GUI, but a webUI instead...

How do you think, what's our chances to get uT working on DNSes ?

KyleK wrote:

jcisio wrote:

After more observation, I conclude the slow hash check is due to disk io (I was copying over samba hundreds of GB of data). However I don't understand why, because hash check, at 30 GB/h or 8 MB/s is related to CPU rather than to HDD I/O.

The NAS doesn't have support for DMA, so any IO access goes through the CPU. Copying data via Samba (which is rather CPU-hungry itself) will thus slow down any other operations on the NAS.

(Besides, if Samba writes files to one part of the disk, and Transmission reads data on another part of the disk (to caculate the piece hashes), the drive's head is moving like crazy to do its work. That'll slow down everything considerably)

It makes sense to me. I didn't think about the DMA.

KyleK wrote:

Hey guys,

sorry for being unavailable recently. I've relocated to another apartment and was without internet access for a month.
But now I'm back and will try to answer an open questions that have piled up since July.

Cheers!

That's great. Thanks for your continuous support.

Well, yes, it is possible, but people have reported crashes when inotify was enabled, so I currently switch it off to be on the safe side. Are you running Transmission with inotify and no crashes?

TiVa wrote:

besides, the download links are dead? Can someone put them back up?

If you are referring to the Transmission download link, in the first post, it is working for me. There is an alternative link a few pages back for v2.03.

FunFiler wrote:

TiVa wrote:

besides, the download links are dead? Can someone put them back up?

If you are referring to the Transmission download link, in the first post, it is working for me. There is an alternative link a few pages back for v2.03.

thanks man! the links in the first posts still don't work, but the 2.03 files will do!

i installed funplug 1.0 (for ch3hnas, provided by conceptronic itself) but can't install all the packages included in 0.5, are they necessary for transmission to work? or is the installation of the funplug itself en curl enough?

Last edited by TiVa (2010-09-08 11:21:27)

Thanks KyleK for a great app.

Only just realised (after owning a 323 for ages) that it could do this - and following your installation instructions made it easy.

It's is certainly going to be more power saving, getting the DNS to download a torrent rather then keep the PC on just to do it

TiVa wrote:

i installed funplug 1.0 (for ch3hnas, provided by conceptronic itself) but can't install all the packages included in 0.5, are they necessary for transmission to work? or is the installation of the funplug itself en curl enough?

damn, can't install tranmission on my ch3hnas with funplug 1.0. the su nobody isn't recognised,
so i can't set the username or password and i'm kinda a noob in linux.
is there a way around this problem?