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I used to log into a remote server on our corporate network using Xephyr and ssh using the following command

Xephyr :0 -ac -br -screen 950x540 | xterm -bg black -fg white -display :0 -e ssh -Yf jidicula@lxsim gnome-session &

where :0 is the display from ENV. This used to work for me, however I got upgraded to a new mac pro machine and this no longer works for me. Would someone be able to help me with this. I understand what this is doing and I made sure to have Xephyr and XQuartz on my new machine so I am kinda baffled as to why this no longer works.

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  • Exactly what did change? Were you using a Mac too before the Pro one? Commented May 7, 2014 at 19:27
  • yes I was..I had the older mac pro and the os x was 10.6 and the one I have now is 10.9 ("mavericks"). My old machine had an xquartz from 2 years ago. those are the only obvious ones I can think of. I went into my ssh config file and turned on X11 forwarding Commented May 7, 2014 at 20:01
  • this command works but it crashes half of the time and i dont trust it to run stuff that takes days on the cluster Xnest -geometry 800x600 :1& DISPLAY=:1 ssh -Y Commented May 7, 2014 at 20:10
  • I'm not totally sure what you are trying to achieve... You are running a nested X server (Xephyr) locally and forwarding X11 from the (network) server into it? Commented May 7, 2014 at 22:07
  • i dont know all the right terminology but I am essentially trying to remote desktop into a linux server using an xserver. i think this guy might be able to explain it a little bit better. dedoimedo.com/computers/xephyr.html Commented May 8, 2014 at 16:50

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so it turns out the issue was due to Xquartz 2.7.5. As soon as I went back to Xquartz 2.7.4 all the old commands started working. So if you are interested in X11 forwarding on a Mac and want to use Xephyr...make sure you are using 2.7.4

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