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Top Forums UNIX for Advanced & Expert Users [Solved] putty+x11:How do I pass X11 display rights to "su"? Post 302593383 by radoulov on Thursday 26th of January 2012 06:07:12 PM
Old 01-26-2012
Try the following:

1. Log in to the system, issue the following commands and save their output for further reference:

Code:
echo "$DISPLAY"
xauth list

You will see something similar to this:

Code:
% echo $DISPLAY
localhost:10.0
% xauth list
ubuntu/unix:12  MIT-MAGIC-COOKIE-1  9e7f2b822e5c1cdd96d048adfb870519
ubuntu/unix:11  MIT-MAGIC-COOKIE-1  1eaf535afee8b2de2f0ab9bcab7ef149
ubuntu/unix:10  MIT-MAGIC-COOKIE-1  3bd9602df5fe354c19e39f211ee4668b

Note the value after the semicolon in the DISPLAY value (10 in this case, in red),
note that the last entry is the cookie you're interested in (also in red).
2. Switch the user (su ...), and run the following commands:

Code:
% su -
Password:
~# export DISPLAY=localhost:10.0 # this is the previously saved DISPLAY value
~# xauth add ubuntu/unix:10  MIT-MAGIC-COOKIE-1  3bd9602df5fe354c19e39f211ee4668b # this is the last entry from xauth list output

After this your X session should work.
 

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Xserver(1)						      General Commands Manual							Xserver(1)

NAME
X - X Window System display server dispatcher SYNOPSIS
X [ option ...] DESCRIPTION
: Hewlett-Packard supports two X servers on HP-UX platforms, the Xhp X server which supports HP VISUALIZE graphics devices and the Xf86 X server which supports all other graphics devices. These X servers are delivered as /usr/bin/X11/Xhp and /usr/bin/X11/Xf86. The X dispatcher determines which X server to launch based on the available graphics devices. The control file /etc/X11/Xstart can provide additional guidance to the X dispatcher. The control file allows the user to specify which X server to start for given display connection numbers. The only X servers supported by the X dispatcher are Xhp, Xf86 and Xvfb. If no Xstart file exists, the dispatcher loads the appropriate X server for the graphics device in the system. HP-UX does not deliver the /etc/X11/Xstart file. This file can be created by using the SAM/SMH utility. OPTIONS
If the X dispatcher is invoked with no arguments, the display connection is assumed to be :0. The X dispatcher checks for display connec- tion options and, if found, uses that display connection number when it checks the Xstart file. All other options are passed on to the X server when it is started and it is the X server's responsibility to validate these options. Not all options may be supported on both X servers; refer to Xhp(1) and Xf86(1) to verify supported options for each X server. RETURN VALUE
None Xstart EXAMPLES The control file syntax is the X server to start followed by the display connection number. Valid entries take the form of: Xhp :0 Start the Xhp X server on display connection 0 Xf86 :10 Start the Xf86 X server on display 10 /usr/bin/X11/Xhp :5 Start the Xhp X server on display connection 5 /usr/bin/X11/Xvfb :7 Start the X Virtual Framebuffer server on display connection 7 FILES
/etc/X11/Xstart Dispatcher control file. /var/X11/Xserver/logs/Xstartup.N.log X dispatcher log file for display N. SEE ALSO
X(1), Xhp(1), Xf86(1) STANDARDS CONFORMANCE
See the appropriate section in Xhp(1) or Xf86(1). Xserver(1)
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