Hi Rod and all,
Thank you so much for your help. I tried what you've suggested. It works! I am so happy for that. But there is still some warnings.
What I've done as below:
My redhat is a new server running redhat enterprise server 6. There isn't ssh2_config file. So like what I did yesterday, I uncommented a line contains 'X11Forwarding yes' in sshd_conf.
Back to Mac, in terminal, type 'xterm&'. In a X terminal, using ssh login to redhad, as Rod suggested. I can login but got two warnings:
Warning: untrusted X11 forwarding setup failed: xauth key data not generated
Warning: No xauth data; using fake authentication data for X11 forwarding.
Although I got those warnings, I still typed xterm& and opened a new xterm which comes from redhat. Then try 'xclock&'. It displayed!! So great!
Now, I have an other question. I opened 'firefox' from xterm. Firefox was also booted up, but the letters on menu and top bar were blurred. And the warnings I got were:
Xlib: extension 'RANDR' missing on display 'localhost:10.0'.
Xlib: extension 'RANDR' missing on display 'localhost:10.0'.
Xlib: extension 'RANDR' missing on display 'localhost:10.0'.
Have you ever met such problem?
This is a new problem. But I already feel so happy that you help me solved a problem which had bothered me for more than three days! Thanks all your help!
  1. Mac Xauth Key Data Not Generated Download
  2. Xauth Generate Example
  3. Mac Xauth Key Data Not Generated Download

Mac Xauth Key Data Not Generated Download

Hi Rod and all,
Thank you so much for your help. I tried what you've suggested. It works! I am so happy for that. But there is still some warnings.
What I've done as below:
My redhat is a new server running redhat enterprise server 6. There isn't ssh2_config file. So like what I did yesterday, I uncommented a line contains 'X11Forwarding yes' in sshd_conf.
Back to Mac, in terminal, type 'xterm&'. In a X terminal, using ssh login to redhad, as Rod suggested. I can login but got two warnings:
Warning: untrusted X11 forwarding setup failed: xauth key data not generated
Warning: No xauth data; using fake authentication data for X11 forwarding.
Although I got those warnings, I still typed xterm& and opened a new xterm which comes from redhat. Then try 'xclock&'. It displayed!! So great!
Now, I have an other question. I opened 'firefox' from xterm. Firefox was also booted up, but the letters on menu and top bar were blurred. And the warnings I got were:
Xlib: extension 'RANDR' missing on display 'localhost:10.0'.
Xlib: extension 'RANDR' missing on display 'localhost:10.0'.
Xlib: extension 'RANDR' missing on display 'localhost:10.0'.
Have you ever met such problem?
This is a new problem. But I already feel so happy that you help me solved a problem which had bothered me for more than three days! Thanks all your help!
XauthNot

Xauth Generate Example

当我在我的Mac上运行ssh -X(运行OS X 10.6.7)连接到我的Ubuntu(11.04)框时,我收到以下警告: Warning: untrusted X11 forwarding setup failed: xauth key data not generated Warning: No xauth data; using fake authentication data for X1.

Mac Xauth Key Data Not Generated Download

Warning: untrusted X11 forwarding setup failed: xauth key data not generated; Warning: No xauth data; using fake authentication data for X11 forwarding; Environment. MacOS Sierra; XQuartz; Cause. XQuartz is old and needs to be updated. Update XQuartz to the latest available version. Warning: No xauth data; using fake authentication data for X11 forwarding. Despite of the annoying warning, ssh is working perfectly, even for programs running on X (i.e. If I run gedit, I get the screen to open and I can operate properly with it). Nov 21, 2014  Warning: No xauth data., although I'm using `ssh -Y` I'm connecting from Cygwin ssh to RHEL 6.5 and using Cygwin XWin Server. 'ForwardX11Trusted yes' in /.ssh/config or `ssh -Y` worked without warnings until today.

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