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Old 03-23-2014, 04:35 AM   #1
Registered: Jul 2012
Distribution: Arch, Debian, and CentOS/RHEL
Posts: 561

Rep: Reputation: 57
Oracle 11g on Oracle Linux - xdpyinfo: unable to open display

Hi all,

Firstly, here is my setup:
1. Debian 7 local machine (ip:
2. Oracle Linux on virtualbox (hostname: oraserver; ip:
3. Oracle Linux has no GUI (no xhost, xlock, etc.)
4. I don't want my Oracle Linux to have any GUI.
5. I can ping from local machine to oraserver, v.v.
6. I can ssh from local machine to oraserver.
7. I tried setting up x11 forwarding on oraserver and using the following command, I assumed my setup is correct:
poo@rocket:~$ ssh -v -X oraadmin@oraserver
OpenSSH_6.0p1 Debian-4, OpenSSL 1.0.1e 11 Feb 2013
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Offering RSA public key: poo@rocket
debug1: Server accepts key: pkalg ssh-rsa blen 279
debug1: Authentication succeeded (publickey).
Authenticated to oraserver ([]:22).
debug1: channel 0: new [client-session]
debug1: Requesting
debug1: Entering interactive session.
debug1: Requesting X11 forwarding with authentication spoofing.
debug1: Sending environment.
debug1: Sending env LANG = en_PH.utf8
Last login: Mon Mar 24 16:52:54 2014 from
[oraadmin@oraserver ~]$
I have already configured everything mentioned in Oracle's install guide (setting kernel parameters, etc.), and here is what I have got so far:
* xhost on my local machine:
root@rocket:/home/poo# xhost +
access control disabled, clients can connect from any host
* $DISPLAY is set for oracle@oraserver:
[oracle@oraserver ~]$ grep DISPLAY ~/.bash_profile
export DISPLAY=
[oracle@oraserver ~]$
(echo would properly display the value)
* output of xdpyinfo on local machine:
root@rocket:/home/poo# xdpyinfo | grep name
name of display:    :0
* I cannot run xdpyinfo on oraserver:
[oracle@oraserver ~]$ xdpyinfo
-bash: xdpyinfo: command not found
[oracle@oraserver ~]$ su

[root@oraserver oracle]# xdpyinfo
bash: xdpyinfo: command not found
[root@oraserver oracle]#

So, after logging in to oraserver and doing (su - oracle) to login as oracle, i tried to run:
and got the following:
Starting Oracle Universal Installer...

Checking Temp space: must be greater than 80 MB.   Actual 30973 MB    Passed
Checking swap space: must be greater than 150 MB.   Actual 799 MB    Passed
Checking monitor: must be configured to display at least 256 colors
    >>> Could not execute auto check for display colors using command /usr/bin/xdpyinfo. Check if the DISPLAY variable is set.    Failed <<<<

Some requirement checks failed. You must fulfill these requirements before

continuing with the installation,

Continue? (y/n) [n] n

User Selected: No

Exiting Oracle Universal Installer, log for this session can be found at /tmp/OraInstall2014-03-24_05-10-29PM/installActions2014-03-24_05-10-29PM.log
I have already spent the day googling around but I really can't see what I am missing here Can someone please help me out?

I already tried logging in to virtualbox directly, but I get the same error.


Last edited by ilesterg; 03-23-2014 at 06:16 AM. Reason: updating title with a more appropriate description of the issue
Old 03-23-2014, 04:41 AM   #2
Registered: Jul 2012
Distribution: Arch, Debian, and CentOS/RHEL
Posts: 561

Original Poster
Rep: Reputation: 57
Ok, so this cleared my mind that xdpyinfo is not something included in an x install. I installed xdpyinfo and tried to run it and got this:
[oracle@oraserver database]$ xdpyinfo
xdpyinfo:  unable to open display "".
[oracle@oraserver database]$
I'll try to figure this out and update this later.

Old 03-23-2014, 05:04 AM   #3
Registered: Jul 2012
Distribution: Arch, Debian, and CentOS/RHEL
Posts: 561

Original Poster
Rep: Reputation: 57 no avail.

Hey guys,

Can someone please point out what I am missing here?


Last edited by ilesterg; 03-23-2014 at 05:08 AM.
Old 03-23-2014, 11:49 PM   #4
Registered: Jul 2012
Distribution: Arch, Debian, and CentOS/RHEL
Posts: 561

Original Poster
Rep: Reputation: 57
I made it! haha

here's the magic:

* don't DO NOT add $DISPLAY in oracle's .bash_profile, then login to oracle@oraserver through 'ssh -x'



oracle database, oracle linux, ssh, x11, xdpyinfo

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