Maria schrieb:
> I am running into some problems with the X11Forwarding example included in
> Jsch.
> Here are the details:
>
> - Jsch 0.1.44 running on an Ubuntu 11.04 PC and also on a Mac Os X 1.6.8
> laptop.
> - When using Jsch on Ubuntu to do a localhost ssh, I get the infamous
> message:
> "Error: Can't open display: localhost:10.0"
> - I get the same error if I try using Jsch from the Mac to connect to the
> Ubuntu
> PC
>
> If I use the command line, 'ssh -X localhost' or ('ssh -X hostname' from the
> Mac), everything works fine.
>
> I've seen old posts about this but none of them ever reported a solution that
> works.
Yeah, I had the same problem. The problem is that from Java we only can
access the X server by TCP (JSch tries the usual port on 6000+display number),
while Ubuntu (as some other Linux distributions) lets the X server listen only
on
a Unix domain socket (by default).
I asked this question about this: http://askubuntu.com/q/41330/11138
> Here's what I've tried (unsuccessfully)
> - type 'xhost' in the terminal
> - type 'xhost +127.0.0.1' in the terminal
You should not need to use xhost - the authentication should be better
done by the authentication cookie.
There are essentially these possibilities on Ubuntu:
* configure the X-server to listen on TCP, and then configure
your firewall not to let anyone from outside in.
(See http://askubuntu.com/q/34657/11138 for details - you have
to remove `-nolisten tcp` from the relevant config file.)
* What I finally did, I think: Use `socat` to forward TCP traffic
to the right Unix port. (The command line is mentioned in my
answer on http://askubuntu.com/q/41330/11138.)
* Another way could be to use some Java library which provides
access to Unix domain sockets (usually by JNI/JNA) and somehow
marry it with JSch (or simply use it for port-forwarding similar
to socat). Here is a list of some which I bookmarked when I last
investigated this problem:
http://stackoverflow.com/q/170600/600500
I'm not sure what is the case on Mac OS - is the X server here
active by default? If so, have a look on its configuration, it
might be the same problem (and similar solutions).
(If you have a `netstat` program, try `netstat -l` and look for
TCP on port 6000 or following, or a unix port named something
with X in it).
Paŭlo
------------------------------------------------------------------------------
AppSumo Presents a FREE Video for the SourceForge Community by Eric
Ries, the creator of the Lean Startup Methodology on "Lean Startup
Secrets Revealed." This video shows you how to validate your ideas,
optimize your ideas and identify your business strategy.
http://p.sf.net/sfu/appsumosfdev2dev
_______________________________________________
JSch-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/jsch-users
